Number of permutations p of [n] such that 0p has a nonincreasing jump sequence beginning with five.

A292171

Number of permutations p of [n] such that 0p has a nonincreasing jump sequence beginning with five.

Terms

    a(0) =16a(1) =47a(2) =117a(3) =327a(4) =988a(5) =3392a(6) =8739a(7) =21372a(8) =53596a(9) =135791a(10) =362528a(11) =887060a(12) =2117839a(13) =4997836a(14) =11731828a(15) =28229247a(16) =66196942a(17) =152418888a(18) =347010327a(19) =784580873a(20) =1794241712a(21) =4064606075a(22) =9109879761a(23) =20253187230a(24) =44774963928a(25) =99368298849a(26) =219638865759a(27) =482519177252

External references