A157144 Hankel transform of A157143.

1, -2, -3, -3, 8, 0, 0, -8, 21, 21, -34, -55, -55, 144, 0, 0, -144, 377, 377, -610, -987, -987, 2584, 0, 0, -2584, 6765, 6765, -10946, -17711, -17711, 46368, 0, 0, -46368, 121393, 121393

Offset

0,2

Comments

Fibonacci numbers missing have indexes 5,7,11,13,17,19,23,25,...(A007310?).

Fibonacci numbers appearing singly seem to have index 3*(2n+1) (except 1).

Links

Table of n, a(n) for n=0..36.

Formula

Empirical g.f.: -(x^11+3*x^8+x^6+9*x^5-2*x^4+3*x^2+2*x-1) / (x^12+3*x^9+8*x^6+3*x^3+1). - Colin Barker, Jun 28 2013

Crossrefs

Sequence in context: A316275 A113031 A127582 * A096714 A078035 A295725

Adjacent sequences: A157141 A157142 A157143 * A157145 A157146 A157147

Keyword

sign

Author

Paul Barry, Feb 24 2009

Status

approved