Number of permutations of [n] with exactly one occurrence of one of the consecutive patterns 123, 1432, 2431, 3421.

A231228

Number of permutations of [n] with exactly one occurrence of one of the consecutive patterns 123, 1432, 2431, 3421.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =1a(4) =9a(5) =59a(6) =358a(7) =2235a(8) =14658a(9) =103270a(10) =778451a(11) =6315499a(12) =54733657a(13) =507655301a(14) =5003179539a(15) =52430810493a(16) =580611272956

External references