Number of integer partitions of n > 0 such that the least and greatest parts are not both odd (equivalently, their product is even).

A391230

Number of integer partitions of n > 0 such that the least and greatest parts are not both odd (equivalently, their product is even).

Terms

    a(0) =0a(1) =1a(2) =1a(3) =3a(4) =4a(5) =6a(6) =9a(7) =13a(8) =18a(9) =24a(10) =34a(11) =44a(12) =61a(13) =78a(14) =104a(15) =133a(16) =176a(17) =221a(18) =288a(19) =360a(20) =462a(21) =575a(22) =729a(23) =901a(24) =1132a(25) =1393a(26) =1733a(27) =2120a(28) =2620a(29) =3190

External references