Obverse convolution (n)**A000201; see Comments.
A374861
Obverse convolution (n)**A000201; see Comments.
Terms
- a(0) =0a(1) =1a(2) =12a(3) =144a(4) =2400a(5) =50400a(6) =1143072a(7) =31046400a(8) =903260160a(9) =30356726400
External references
- oeis: A374861