Column 1 of triangle A136220; also equals column 0 of U^2 = A136233 where U = A136228.
A136222
Column 1 of triangle A136220; also equals column 0 of U^2 = A136233 where U = A136228.
Terms
- a(0) =1a(1) =2a(2) =10a(3) =75a(4) =753a(5) =9534a(6) =146353a(7) =2647628a(8) =55251994a(9) =1308089217a(10) =34669446816
External references
- oeis: A136222