a(n) = Sum_{p in P} (Sum_{k_j = 1} 1)^2, where P is the set of partitions of n, and the k_j are the frequencies in p.
A302300
a(n) = Sum_{p in P} (Sum_{k_j = 1} 1)^2, where P is the set of partitions of n, and the k_j are the frequencies in p.
Terms
- a(0) =0a(1) =1a(2) =1a(3) =5a(4) =6a(5) =12a(6) =21a(7) =33a(8) =50a(9) =79a(10) =116a(11) =169a(12) =246a(13) =346a(14) =487a(15) =675a(16) =927a(17) =1254a(18) =1702a(19) =2263a(20) =3014a(21) =3966a(22) =5210a(23) =6766a(24) =8795a(25) =11303a(26) =14531a(27) =18521a(28) =23583a(29) =29803
External references
- oeis: A302300