Number of permutations of [n] having a shortest ascending run of length 7.

A228674

Number of permutations of [n] having a shortest ascending run of length 7.

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =3431a(8) =12868a(9) =22878a(10) =38894a(11) =63646a(12) =100774a(13) =155038a(14) =399072959a(15) =3291371293a(16) =17874723750a(17) =70661650187a(18) =242176782370a(19) =762243414933

External references