Number of singly defective permutations of 1..n+2 with exactly 2 maxima.

A183265

Number of singly defective permutations of 1..n+2 with exactly 2 maxima.

Terms

    a(0) =3a(1) =80a(2) =860a(3) =6576a(4) =42112a(5) =242688a(6) =1306944a(7) =6721280a(8) =33448448a(9) =162435072a(10) =774052864a(11) =3633229824a(12) =16842670080a(13) =77264322560a(14) =351273107456

External references