A144708 a(n) = 6^n * (1-4*n).

1, -18, -252, -2376, -19440, -147744, -1073088, -7558272, -52068096, -352719360, -2358180864, -15600273408, -102308769792, -666095394816, -4310029025280, -27740914089984, -177729924169728, -1134086182797312, -7210756923457536

Offset: 0

Author

Paul Barry, Sep 19 2008

Keywords

• easy
• sign

Links

• G. C. Greubel, Table of n, a(n) for n = 0..1000
• Index entries for linear recurrences with constant coefficients, signature (12,-36).

Crossrefs

Hankel transform of A144706.

Cf. A000400, A131098.

Programs

Magma

[(1-4*n)*6^n: n in [0..30]]; // G. C. Greubel, Jun 16 2022

Mathematica

Table[6^n (1-4n),{n,0,20}] (* Harvey P. Dale, Apr 01 2011 *)

SageMath

[(1-4*n)*6^n for n in (0..30)] # G. C. Greubel, Jun 16 2022

Formula

G.f.: (1-30*x)/(1-6*x)^2.

E.g.f.: (1-24*x)*exp(6*x). - G. C. Greubel, Jun 16 2022