Column 1 of triangle A136225; also equals column 0 of triangle A136230.

A136227

Column 1 of triangle A136225; also equals column 0 of triangle A136230.

Terms

    a(0) =1a(1) =4a(2) =26a(3) =232a(4) =2657a(5) =37405a(6) =627435a(7) =12248365a(8) =273211787a(9) =6862775083a(10) =191840407156

External references