Improved version of A002685; main diagonal of A324124.
A328884
Improved version of A002685; main diagonal of A324124.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =34a(4) =250a(5) =972a(6) =15498a(7) =109544a(8) =5961306a(9) =54891535a(10) =2488870076a(11) =246264587430a(12) =118503860254
External references
- oeis: A328884