A065594 a(n) = A036981(n)/(2n)!.
1, 3, 30, 43680, 11030100480, 2775108817859051520, 1283862525618838460637401579520
Offset: 0
Crossrefs
Cf. A036981.
Extensions
a(5)-a(6) added using the data at A036981 by Amiram Eldar, Jul 19 2025
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