Number of partitions of [n] having exactly one parity change within their blocks.

A363511

Number of partitions of [n] having exactly one parity change within their blocks.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =2a(4) =6a(5) =18a(6) =61a(7) =210a(8) =778a(9) =3008a(10) =12219a(11) =52268a(12) =231726a(13) =1083012a(14) =5202199a(15) =26307710a(16) =135972580a(17) =738339310a(18) =4081523615a(19) =23649300862a(20) =139096468520a(21) =855529383396

External references