A139611 - OEIS

A139611

a(n) = 55*n + 11.

11, 66, 121, 176, 231, 286, 341, 396, 451, 506, 561, 616, 671, 726, 781, 836, 891, 946, 1001, 1056, 1111, 1166, 1221, 1276, 1331, 1386, 1441, 1496, 1551, 1606, 1661, 1716, 1771, 1826, 1881, 1936, 1991, 2046, 2101, 2156, 2211, 2266

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OFFSET

0,1

COMMENTS

Numbers of the 11th column of positive numbers in the square array of nonnegative and polygonal numbers A139600.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..5000

Index to sequences related to polygonal numbers

Index entries for linear recurrences with constant coefficients, signature (2,-1).

FORMULA

a(n) = A057145(n+2,11).

a(n) = 11 * A016861(n). - Wesley Ivan Hurt, Apr 16 2014

G.f.: 11*(1+4*x)/(x-1)^2 . - R. J. Mathar, Jul 28 2016

From Elmo R. Oliveira, Apr 16 2024: (Start)

E.g.f.: 11*exp(x)*(1 + 5*x).

a(n) = 11*(A000566(n+1) - A000566(n)).

a(n) = 2*a(n-1) - a(n-2) for n >= 2. (End)

MAPLE

A139611:=n->55*n + 11; seq(A139611(n), n=0..50); # Wesley Ivan Hurt, Apr 16 2014

MATHEMATICA

Table[55 n + 11, {n, 0, 50}] (* Wesley Ivan Hurt, Apr 16 2014 *)

PROG

(Magma) [11*(5*n + 1): n in [0..60]]; // Vincenzo Librandi, Jul 23 2011

(PARI) a(n)=55*n+11 \\ Charles R Greathouse IV, Oct 05 2011

CROSSREFS

Cf. A000566, A016861, A057145, A139600.

Sequence in context: A054490 A126479 A260151 * A154617 A297751 A063842

Adjacent sequences: A139608 A139609 A139610 * A139612 A139613 A139614

KEYWORD

easy,nonn

AUTHOR

Omar E. Pol, Apr 27 2008

STATUS

approved