Number of partitions of [n] such that the number of blocks containing only odd elements equals the number of blocks containing only even elements.

A363451

Number of partitions of [n] such that the number of blocks containing only odd elements equals the number of blocks containing only even elements.

Terms

    a(0) =1a(1) =0a(2) =2a(3) =2a(4) =9a(5) =23a(6) =99a(7) =353a(8) =1778a(9) =7927a(10) =45273a(11) =238797a(12) =1526331a(13) =9215950a(14) =65020448a(15) =439742641a(16) =3388075807a(17) =25270974635a(18) =210763775071

External references