A109467 4 X 4 analog of A094943.

1, 26, 256, 2472, 25056, 250016, 2499456, 25002112, 249995776, 2500000256, 25000032256, 249999869952, 2500000260096, 25000000004096, 249999997894656, 2500000008404992, 24999999983190016, 250000000000065536, 2500000000134086656, 24999999999463391232

Offset

0,2

Links

Table of n, a(n) for n=0..19.

Formula

a(n+4)=4*a(n+3)+44*a(n+2)+144*a(n+1)+160*a(n), a(0) = 1, a(1) = 26, a(2) = 256, a(3) = 2472.

G.f.: (1+22*x+108*x^2+160*x^3)/(1-4*x-44*x^2-144*x^3-160*x^4).

Crossrefs

Sequence in context: A296539 A229715 A125389 * A126547 A136922 A136921

Adjacent sequences: A109464 A109465 A109466 * A109468 A109469 A109470

Keyword

nonn

Author

_N. J. A. Sloane_, based on email from Alec Mihailovs, Aug 28 2005

Status

approved