Number of permutations of [n] having exactly five (possibly overlapping) doubledescents.

A279294

Number of permutations of [n] having exactly five (possibly overlapping) doubledescents.

Terms

    a(0) =1a(1) =14a(2) =597a(3) =11486a(4) =265354a(5) =5307274a(6) =110325975a(7) =2250025170a(8) =46909998946a(9) =990648740298

External references