A139249 a(n) = 30*n - 24.

6, 36, 66, 96, 126, 156, 186, 216, 246, 276, 306, 336, 366, 396, 426, 456, 486, 516, 546, 576, 606, 636, 666, 696, 726, 756, 786, 816, 846, 876, 906, 936, 966, 996, 1026, 1056, 1086, 1116, 1146, 1176, 1206, 1236, 1266, 1296, 1326, 1356, 1386, 1416, 1446, 1476

Offset

1,1

Comments

Multiples of 6 with unit digit equal to 6.

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..2000

William A. Stein, Dimensions of the spaces S_k(Gamma_0(N)).

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

Formula

a(n) = a(n-1) + 30.

From Elmo R. Oliveira, Apr 04 2025: (Start)

G.f.: 6*x*(1+4*x)/(1-x)^2.

E.g.f.: 6*(exp(x)*(5*x - 4) + 4).

a(n) = 6*A016861(n-1).

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

Mathematica

Range[6, 7000, 30] (* Vladimir Joseph Stephan Orlovsky, Jun 18 2011 *)
NestList[30+#&, 6, 50] (* or *) LinearRecurrence[{2, -1}, {6, 36}, 50] (* Harvey P. Dale, May 27 2018 *)

Prog

(Magma) [30*n - 24: n in [1..60]]; // Vincenzo Librandi, Jun 19 2011
(PARI) a(n)=30*n-24 \\ Charles R Greathouse IV, Aug 25 2014

Crossrefs

Subsequence of A034709, together with A017281, A017293, A139222, A139245, A017329, A139264, A139279 and A139280. - Reinhard Zumkeller, Jun 22 2008

Cf. A016861, A063168.

Sequence in context: A036148 A134639 A069497 * A070150 A161144 A364586

Adjacent sequences: A139246 A139247 A139248 * A139250 A139251 A139252

Keyword

easy,nonn

Author

Odimar Fabeny, Jun 06 2008, Jun 07 2008

Extensions

More terms from Reinhard Zumkeller, Jun 22 2008

Edited by R. J. Mathar, Jul 20 2008

Status

approved