The number of integer partitions P of n such that either the length k of P is not a part or P has at least one part equal to 1 (or both).

A229863

The number of integer partitions P of n such that either the length k of P is not a part or P has at least one part equal to 1 (or both).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =3a(4) =4a(5) =6a(6) =10a(7) =13a(8) =20a(9) =27a(10) =38a(11) =51a(12) =71a(13) =92a(14) =125a(15) =163a(16) =214a(17) =276a(18) =360a(19) =457a(20) =588a(21) =743a(22) =942a(23) =1182a(24) =1487a(25) =1848a(26) =2306a(27) =2852a(28) =3527a(29) =4335

External references