Column 2 of triangle A125653; also equals the eigensequence of the matrix square of A125653.
A125655
Column 2 of triangle A125653; also equals the eigensequence of the matrix square of A125653.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =24a(5) =84a(6) =335a(7) =1495a(8) =7381a(9) =39912a(10) =234360a(11) =1483864a(12) =10070570a(13) =72885794a(14) =560059512a(15) =4551397316a(16) =38984638708a(17) =350888140187
External references
- oeis: A125655