Total size of all principal order ideals in the poset of integer partitions of n with the refinement order.

A265947

Total size of all principal order ideals in the poset of integer partitions of n with the refinement order.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =6a(4) =14a(5) =26a(6) =55a(7) =99a(8) =192a(9) =340a(10) =619a(11) =1063a(12) =1873a(13) =3129a(14) =5308a(15) =8718a(16) =14385a(17) =23116a(18) =37346a(19) =58949a(20) =93294a(21) =145131a(22) =225623a(23) =345833a(24) =529976a(25) =801675a(26) =1211225a(27) =1811558a(28) =2703327a(29) =3998289

External references