A130018 Eigensequence of A053121.

1, 1, 1, 2, 4, 9, 22, 56, 152, 428, 1257, 3827, 12023, 38975, 129801, 443833, 1554849, 5572334, 20409121, 76283610, 290737945, 1128730320, 4460079331, 17924115817, 73207479057, 303691230784, 1278796858227, 5462983288161, 23664467118878, 103895077228910

Offset: 0

Author

Philippe Deléham, Jun 16 2007

Keywords

• nonn

Crossrefs

Cf. A053121.

Formula

a(n) = Sum_{k=0..n-1} A053121(n-1,k)*a(k) for n>0 with a(0)=1.

Extensions

More terms from Jason Yuen, Sep 20 2024