Eigensequence of triangle A038208.

A165193

Eigensequence of triangle A038208.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =28a(4) =352a(5) =7888a(6) =319168a(7) =23833792a(8) =3359617024a(9) =911281182976

External references