A024729 a(n) = Sum_{i=1..floor((n+1)/4)} a(2*i-1) * a(n-2*i+1), with a(1)=a(2)=1 and a(3)=5.

1, 1, 5, 5, 5, 5, 30, 55, 80, 230, 530, 1080, 2505, 5555, 13755, 31330, 71405, 168605, 403830, 947180, 2199905, 5189130, 12724755, 30313630, 71503880, 171244630, 421182405, 1012930055, 2420011955, 5834077855, 14434795655, 34963583830

Offset

1,3

Links

Table of n, a(n) for n=1..32.

Crossrefs

Sequence in context: A282209 A082476 A365492 * A046271 A341600 A283076

Adjacent sequences: A024726 A024727 A024728 * A024730 A024731 A024732

Keyword

nonn

Author

Clark Kimberling

Status

approved