Column 2 of triangle A121412, in which row n of T=A121412 equals row (n-1) of T^(n+1) with an appended '1'.
A121414
Column 2 of triangle A121412, in which row n of T=A121412 equals row (n-1) of T^(n+1) with an appended '1'.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =45a(4) =581a(5) =9730a(6) =199692a(7) =4843125a(8) =135345925a(9) =4278317373a(10) =150818840250
External references
- oeis: A121414