A026073 T(2n,n), where T is the array defined in A024996.

1, 2, 5, 24, 133, 736, 4135, 23452, 134043, 770864, 4455462, 25859380, 150615223, 879876040, 5153445895, 30251941860, 177938418225, 1048452751872, 6187400646130, 36566048896896, 216370786646054

Offset

0,2

Links

Table of n, a(n) for n=0..20.

Crossrefs

Bisection of A026078.

Sequence in context: A194349 A208969 A020022 * A054131 A086635 A020124

Adjacent sequences: A026070 A026071 A026072 * A026074 A026075 A026076

Keyword

nonn

Author

Clark Kimberling

Status

approved