The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A139600

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A139600

Square array T(n,k) = n*(k-1)*k/2+k, of nonnegative numbers together with polygonal numbers, read by antidiagonals upwards.
(history; published version)

#65 by Peter Luschny at Sat Jul 13 02:14:30 EDT 2024

STATUS

reviewed

approved

#64 by Joerg Arndt at Sat Jul 13 01:47:45 EDT 2024

STATUS

proposed

reviewed

#63 by G. C. Greubel at Fri Jul 12 23:22:05 EDT 2024

STATUS

editing

proposed

#62 by G. C. Greubel at Fri Jul 12 23:20:45 EDT 2024

PROG

(Magma)

T:= func< n, k | k*(n*(k-1)+2)/2 >;

A139600:= func< n, k | T(n-k, k) >;

[A139600(n, k): k in [0..n], n in [0..12]]; // G. C. Greubel, Jul 12 2024

(SageMath)

def T(n, k): return k*(n*(k-1)+2)/2

def A139600(n, k): return T(n-k, k)

flatten([[A139600(n, k) for k in range(n+1)] for n in range(13)]) # G. C. Greubel, Jul 12 2024

STATUS

approved

editing

#61 by Joerg Arndt at Tue Apr 16 10:08:53 EDT 2024

STATUS

reviewed

approved

#60 by Michel Marcus at Tue Apr 16 09:37:36 EDT 2024

STATUS

proposed

reviewed

#59 by Robert C. Lyons at Tue Apr 16 09:33:05 EDT 2024

STATUS

editing

proposed

#58 by Robert C. Lyons at Tue Apr 16 09:33:02 EDT 2024

PROG

(Python 3)

STATUS

approved

editing

#57 by Michael De Vlieger at Mon Apr 15 12:18:22 EDT 2024

STATUS

reviewed

approved

#56 by Michel Marcus at Mon Apr 15 07:24:17 EDT 2024

STATUS

proposed

reviewed