Formal inverse of triangle A080246. Unsigned version of A080245.

Terms

a(0) =1a(1) =2a(2) =1a(3) =6a(4) =4a(5) =1a(6) =22a(7) =16a(8) =6a(9) =1a(10) =90a(11) =68a(12) =30a(13) =8a(14) =1a(15) =394a(16) =304a(17) =146a(18) =48a(19) =10a(20) =1a(21) =1806a(22) =1412a(23) =714a(24) =264a(25) =70a(26) =12a(27) =1a(28) =8558a(29) =6752