Column 1 of triangle A121412, in which row n of T equals row (n-1) of T^(n+1) with an appended '1'.
A121413
Column 1 of triangle A121412, in which row n of T equals row (n-1) of T^(n+1) with an appended '1'.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =30a(4) =335a(5) =4984a(6) =92652a(7) =2065146a(8) =53636520a(9) =1589752230a(10) =52926799310
External references
- oeis: A121413