Signed recurrence over enriched r-trees: a(n) = (-1)^n + Sum_y Product_{i in y} a(y) where the sum is over all integer partitions of n - 1.
A301470
Signed recurrence over enriched r-trees: a(n) = (-1)^n + Sum_y Product_{i in y} a(y) where the sum is over all integer partitions of n - 1.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =1a(6) =2a(7) =3a(8) =5a(9) =9a(10) =15a(11) =27a(12) =47a(13) =87a(14) =155a(15) =288a(16) =524a(17) =983a(18) =1813a(19) =3434a(20) =6396a(21) =12174a(22) =22891a(23) =43810a(24) =82925a(25) =159432a(26) =303559a(27) =585966a(28) =1121446a(29) =2171341
External references
- oeis: A301470