a(0) = 1; thereafter a(n) = Sum_{k=1..n} (2*k)^k * Stirling1(n,k).
A351274
a(0) = 1; thereafter a(n) = Sum_{k=1..n} (2*k)^k * Stirling1(n,k).
Terms
- a(0) =1a(1) =2a(2) =14a(3) =172a(4) =2964a(5) =65848a(6) =1789688a(7) =57521280a(8) =2133964352a(9) =89744964288
External references
- oeis: A351274