Signed recurrence over enriched r-trees: a(n) = 2 * (-1)^n + Sum_y Product_{i in y} a(y) where the sum is over all integer partitions of n - 1.
A301469
Signed recurrence over enriched r-trees: a(n) = 2 * (-1)^n + Sum_y Product_{i in y} a(y) where the sum is over all integer partitions of n - 1.
Terms
- a(0) =2a(1) =-1a(2) =1a(3) =0a(4) =0a(5) =1a(6) =0a(7) =1a(8) =1a(9) =1a(10) =2a(11) =3a(12) =3a(13) =6a(14) =7a(15) =11a(16) =17a(17) =23a(18) =35a(19) =53a(20) =75a(21) =119a(22) =173a(23) =264a(24) =398a(25) =603a(26) =911a(27) =1411a(28) =2114a(29) =3279
External references
- oeis: A301469