A110249 Diagonal sums of a Jacobi number triangle.

1, 0, 1, 1, 2, 0, 1, 2, 2, 0, 2, 3, 5, 0, 3, 3, 2, 0, 1, 4, 4, 0, 0, 5, 11, 0, 3, 4, 2, 0, 3, 2, 4, 0, 4, 7, 2, 0, 4, 5, 14, 0, 2, 6, 6, 0, 2, 8, 2, 0, 7, 5, 4, 0, 3, 8, 4, 0, 2, 10, 28, 0, 1, 5, 6, 0, 2, 2, 4, 0, 4, 10, 4, 0, 7, 7, 0, 0, 3, 10, 8, 0, 4, 11, 39, 0, 7, 2, 2, 0, 5, 8, 8, 0, 2, 13, 2, 0, 5, 9, 6

Offset

0,5

Comments

Diagonal sums of number triangle A110247.

Links

Table of n, a(n) for n=0..100.

Formula

a(n)=sum{k=0..floor(n/2), Jacobi(k, 2n-4k+1)}

Crossrefs

Sequence in context: A305436 A328708 A299480 * A160756 A306327 A176239

Adjacent sequences: A110246 A110247 A110248 * A110250 A110251 A110252

Keyword

easy,nonn

Author

Paul Barry, Jul 17 2005

Status

approved