Row sums of unsigned triangle A129467.

A130032

Row sums of unsigned triangle A129467.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =21a(4) =273a(5) =5733a(6) =177723a(7) =7642089a(8) =435599073a(9) =31798732329

External references