Stirling transform of A002457.

Terms

a(0) =1a(1) =6a(2) =36a(3) =236a(4) =1686a(5) =13028a(6) =108078a(7) =956348a(8) =8976708a(9) =88962160a(10) =927129786a(11) =10125636716a(12) =115543526476