a(n) = total number of partitions of [1, 2, ..., k] into exactly n blocks, each of size 1, 2, 3 or 4, for 0 <= k <= 4n.
A144508
a(n) = total number of partitions of [1, 2, ..., k] into exactly n blocks, each of size 1, 2, 3 or 4, for 0 <= k <= 4n.
Terms
- a(0) =1a(1) =4a(2) =121a(3) =18252a(4) =7958726a(5) =7528988476
External references
- oeis: A144508