2537640

Appears in sequences

• Number of partitions of {1...n} containing 3 detached pairs of consecutive integers, i.e., partitions in which only 1- or 2-strings of consecutive integers can appear in a block and there are exactly three 2-strings.at n=7A105489
• a(n) = 4*(3*n+2)*(2*n+1)*(n+2)*(n+1).at n=18A155122