The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A264852

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A264852

a(n) = n*(n + 1)*(n + 2)*(9*n - 7)/12.
(history; published version)

#18 by Charles R Greathouse IV at Sun Feb 16 08:33:27 EST 2025

LINKS

Eric Weisstein's World of Mathematics, <a href="httphttps://mathworld.wolfram.com/PyramidalNumber.html">Pyramidal Number</a>

Discussion

Sun Feb 16

08:33

OEIS Server: https://oeis.org/edit/global/3014

#17 by Charles R Greathouse IV at Thu Sep 08 08:46:14 EDT 2022

PROG

(MAGMAMagma) [n*(n+1)*(n+2)*(9*n-7)/12: n in [0..50]]; // Vincenzo Librandi, Nov 27 2015

Discussion

Thu Sep 08

08:46

OEIS Server: https://oeis.org/edit/global/2944

#16 by Charles R Greathouse IV at Tue Jul 26 20:43:59 EDT 2016

STATUS

editing

approved

#15 by Charles R Greathouse IV at Tue Jul 26 20:42:42 EDT 2016

PROG

(PARI) a(n)=n*(n+1)*(n+2)*(9*n-7)/12 \\ Charles R Greathouse IV, Jul 26 2016

STATUS

approved

editing

#14 by Bruno Berselli at Fri Nov 27 10:09:54 EST 2015

STATUS

editing

approved

#13 by Bruno Berselli at Fri Nov 27 10:09:50 EST 2015

CROSSREFS

Cf. similar sequences with formula n*(n+1)*(n+2)*(k*n-k+2)/12 listed in A264850.

#12 by Bruno Berselli at Fri Nov 27 09:42:13 EST 2015

COMMENTS

Partial sums of 20-gonal (or icosagonal) pyramidal numbers. Therefore, this is the case k=9 of the general formula n*(n + 1)*(n + 2)*(k*n - k + 2)/12, which is related to 2*(k+1)-gonal pyramidal numbers.

#11 by Bruno Berselli at Fri Nov 27 09:34:50 EST 2015

COMMENTS

Partial sums of 20-gonal (or icosagonal) pyramidal numbers. Therefore, this is the case k=9 of the general formula n*(n + 1)*(n + 2)*(k*n - k + 2)/12, which is related to k-gonal pyramidal numbers.

This is the case k=9 of the general formula n*(n + 1)*(n + 2)*(k*n - k + 2)/12.

#10 by Bruno Berselli at Fri Nov 27 09:33:22 EST 2015

COMMENTS

Thisis This is the case k=9 of the general formula n*(n + 1)*(n + 2)*(k*n - k + 2)/12.

#9 by Bruno Berselli at Fri Nov 27 09:32:37 EST 2015

COMMENTS

Thisis the case k=9 of the general formula n*(n + 1)*(n + 2)*(k*n - k + 2)/12.