Shifts left under Stirling2 transform.

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =26a(5) =152a(6) =1144a(7) =10742a(8) =122772a(9) =1673856a(10) =26780972a(11) =496090330a(12) =10519217930a(13) =252851833482