Number of n-photon quenched skeletons.

Terms

a(0) =1a(1) =1a(2) =1a(3) =7a(4) =63a(5) =729a(6) =10113a(7) =161935a(8) =2923135a(9) =58547761a(10) =1286468225a(11) =30747331223a(12) =793992877247