Number of partitions of 2n-set in which number of blocks of size 2k-1 is even (or zero) for every k.

A130222

Number of partitions of 2n-set in which number of blocks of size 2k-1 is even (or zero) for every k.

Terms

    a(0) =1a(1) =2a(2) =11a(3) =117a(4) =2116a(5) =54233a(6) =1822053a(7) =76771684a(8) =3922196627a(9) =238355654605

External references