A084850 2^(n-1)*(n^2+2n+2).

1, 5, 20, 68, 208, 592, 1600, 4160, 10496, 25856, 62464, 148480, 348160, 806912, 1851392, 4210688, 9502720, 21299200, 47448064, 105119744, 231735296, 508559360, 1111490560, 2420113408, 5251268608, 11358175232, 24494735360

Offset

0,2

Comments

Binomial transform of A084849. a(n)=A014477(n-1)+A001787(n+1).

Links

Table of n, a(n) for n=0..26.

Index entries for linear recurrences with constant coefficients, signature (6,-12,8).

Formula

G.f.: (1 - x+2x^2)/(1 - 2x)^3.

Equals A134083 * [1,2,3,...]. - Gary W. Adamson, Oct 07 2007

Mathematica

LinearRecurrence[{6, -12, 8}, {1, 5, 20}, 40] (* Harvey P. Dale, Mar 15 2016 *)

Crossrefs

Cf. A134083.

Sequence in context: A032286 A097552 A322600 * A270169 A007327 A055403

Adjacent sequences: A084847 A084848 A084849 * A084851 A084852 A084853

Keyword

easy,nonn

Author

Paul Barry, Jun 09 2003

Status

approved