A176778 2^n-n*(n+2).

1, -1, -4, -7, -8, -3, 16, 65, 176, 413, 904, 1905, 3928, 7997, 16160, 32513, 65248, 130749, 261784, 523889, 1048136, 2096669, 4193776, 8388033, 16776592, 33553757, 67108136, 134216945, 268434616, 536870013, 1073740864, 2147482625

Offset

0,3

Links

Table of n, a(n) for n=0..31.

Index entries for linear recurrences with constant coefficients, signature (5,-9,7,-2).

Formula

G.f.: -(3*x-1)*(x^2-3*x+1) / ( (2*x-1)*(x-1)^3 ). - R. J. Mathar, Feb 18 2016

Mathematica

Table[2^n-n*(n+2), {n, 0, 5!}]

Crossrefs

Cf. A014846, A142974, A176776, A176777

Sequence in context: A190260 A318383 A151958 * A021213 A154687 A115021

Adjacent sequences: A176775 A176776 A176777 * A176779 A176780 A176781

Keyword

sign,easy

Author

Vladimir Joseph Stephan Orlovsky, Apr 25 2010

Status

approved