A135967 Row sums of triangle A135966.

1, 2, 3, 6, 13, 38, 141, 672, 4081, 31544, 310171, 3879588, 61725481, 1249215110, 32159093791, 1053086855394, 43865027507209, 2324162212695626, 156642025511922149, 13429008862711938180, 1464446313265909756141

Offset

0,2

Links

Table of n, a(n) for n=0..20.

Formula

a(n) = Sum_{k=0..n} fibonacci(k(n-k) + 1).

Prog

(PARI) a(n)=sum(k=0, n, fibonacci(k*(n-k)+1))

Crossrefs

Cf. A135966.

Sequence in context: A002877 A065845 A137273 * A290248 A146000 A134737

Adjacent sequences: A135964 A135965 A135966 * A135968 A135969 A135970

Keyword

nonn

Author

Paul D. Hanna, Dec 11 2007

Status

approved