A139279 a(n) = 40*n - 32.

8, 48, 88, 128, 168, 208, 248, 288, 328, 368, 408, 448, 488, 528, 568, 608, 648, 688, 728, 768, 808, 848, 888, 928, 968, 1008, 1048, 1088, 1128, 1168, 1208, 1248, 1288, 1328, 1368, 1408, 1448, 1488, 1528, 1568, 1608, 1648, 1688, 1728, 1768, 1808, 1848

Offset: 1

Author

Odimar Fabeny, Jun 06 2008

Keywords

• nonn
• easy

Comments

Multiples of 8 with unit digit equal to 8.

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..2000
• Index entries for linear recurrences with constant coefficients, signature (2,-1).

Crossrefs

Subsequence of A034709, together with A017281, A017293, A139222, A139245, A017329, A139249, A139264 and A139280.

Programs

Magma

[40*n-32: n in [1..50]]; // Vincenzo Librandi, Jun 19 2011

Mathematica

NestList[#+40&,8,50] (* Harvey P. Dale, Oct 02 2013 *)

PARI

a(n)=40*n-32 \\ Charles R Greathouse IV, Aug 25 2014

Formula

a(n) = a(n-1) + 40.

From G. C. Greubel, Jul 18 2017: (Start)

G.f.: (72*x - 32)/(1-x)^2.

E.g.f.: (40*x - 32)*exp(x). (End)

Extensions

More terms from Reinhard Zumkeller, Jun 22 2008

New definition from Paolo P. Lava, Sep 06 2010