A024945 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)=2.

1, 1, 2, 2, 2, 6, 10, 14, 26, 50, 90, 162, 290, 622, 1186, 2206, 4274, 8802, 17378, 33538, 65986, 136790, 274282, 540686, 1082698, 2238978, 4537082, 9091330, 18322466, 38230558, 78041890, 157766622, 321334306, 670282690, 1377130434, 2806589186

Offset

1,3

Links

Table of n, a(n) for n=1..36.

Crossrefs

Sequence in context: A323862 A291667 A052537 * A186507 A032306 A227847

Adjacent sequences: A024942 A024943 A024944 * A024946 A024947 A024948

Keyword

nonn

Author

Clark Kimberling

Extensions

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

Status

approved