VOOZH about

URL: https://oeis.org/A024735

⇱ A024735 - OEIS

login
A024735
a(n) = Sum_{i=1..floor((n+1)/4)} a(2*i-1) * a(n-2*i+1), with a(1)=2 and a(2)=a(3)=1.
1
2, 1, 1, 2, 4, 8, 18, 40, 88, 194, 460, 1080, 2514, 5840, 14256, 34450, 82552, 197696, 489714, 1204736, 2945128, 7188018, 18002376, 44805640, 110894770, 274209616, 691588200, 1736001314, 4338383356, 10827952192, 27470096770, 69388005832
OFFSET
1,1
CROSSREFS
Sequence in context: A384336 A333450 A210112 * A024957 A153914 A151893
KEYWORD
nonn
STATUS
approved