A152620 a(n)=-8*a(n-1)-6*a(n-2), n>1 ; a(0)=1, a(1)=-2 .

1, -2, 10, -68, 484, -3464, 24808, -177680, 1272592, -9114656, 65281696, -467565632, 3348834880, -23985285248, 171789272704, -1230402470144, 8812484124928, -63117458178560, 452064760678912, -3237813336359936

Offset: 0

Author

Philippe Deléham, Dec 10 2008

Keywords

• sign

Links

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

Crossrefs

Cf. A152594

Programs

Mathematica

LinearRecurrence[{-8,-6},{1,-2},30] (* Harvey P. Dale, Apr 03 2015 *)

Formula

G.f.: (1+6*x)/(1+8*x+6*x^2). a(n)=Sum_{k, 0<=k<=n}A147703(n,k)*(-3)^(n-k).