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URL: https://oeis.org/A024729

⇱ A024729 - OEIS

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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, 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
CROSSREFS
Sequence in context: A082476 A365492 A385552 * A046271 A341600 A283076
KEYWORD
nonn
STATUS
approved