Obverse convolution A000201**A000201; see Comments.
A374862
Obverse convolution A000201**A000201; see Comments.
Terms
- a(0) =0a(1) =1a(2) =18a(3) =256a(4) =5400a(5) =153664a(6) =4251528a(7) =146410000a(8) =5159780352a(9) =215051077696
External references
- oeis: A374862