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