a(n) = Sum_{k=0..n} binomial(3*n, n-k) * p(k), where p(k) is the partition function A000041.
A356282
a(n) = Sum_{k=0..n} binomial(3*n, n-k) * p(k), where p(k) is the partition function A000041.
Terms
- a(0) =1a(1) =4a(2) =23a(3) =141a(4) =888a(5) =5675a(6) =36602a(7) =237563a(8) =1548995a(9) =10135554a(10) =66504699a(11) =437359454a(12) =2881641263a(13) =19016505326a(14) =125664684700a(15) =831400186740
External references
- oeis: A356282