A024953 a(n) = Sum_{i=1..floor((n+2)/4)} a(2i-1)*a(n-2i+1), with a(1)=a(2)=1 and a(3)=6.

1, 1, 6, 6, 6, 42, 78, 114, 366, 870, 1806, 4470, 10374, 29490, 70422, 172050, 443670, 1203270, 3079590, 7634310, 19822470, 53513466, 138825006, 355353522, 932324478, 2521602582, 6627329070, 17259334422, 45447231174, 124012157154, 328387674390

Offset

1,3

Links

Table of n, a(n) for n=1..31.

Crossrefs

Sequence in context: A054435 A019175 A245100 * A092281 A082796 A078245

Adjacent sequences: A024950 A024951 A024952 * A024954 A024955 A024956

Keyword

nonn

Author

Clark Kimberling

Extensions

Offset corrected and title improved by Sean A. Irvine, Jul 30 2019

Status

approved