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A024739
a(n) = Sum_{i=1..floor((n+1)/4)} a(2*i-1) * a(n-2*i+1), with a(1)=a(3)=2 and a(2)=1.
1
2, 1, 2, 4, 8, 16, 40, 96, 224, 528, 1376, 3520, 8864, 22272, 59648, 156992, 407808, 1060864, 2872960, 7701504, 20460032, 54299904, 148601856, 402977792, 1084414464, 2918055936, 8035600384, 21980652544, 59769698304, 162381037568, 449715144704
OFFSET
1,1
CROSSREFS
Sequence in context: A049903 A325665 A325843 * A359689 A024959 A029728
KEYWORD
nonn
EXTENSIONS
a(26) corrected by Sean A. Irvine, Jul 21 2019
STATUS
approved