Smallest number m such that A212813(m) = n.

Terms

a(0) =1a(1) =8a(2) =7a(3) =9a(4) =13a(5) =17a(6) =37a(7) =86a(8) =157a(9) =326a(10) =941a(11) =2811a(12) =11878a(13) =56054a(14) =56053a(15) =232966a(16) =465926a(17) =6988755a(18) =25159587a(19) =75478749a(20) =880585235a(21) =2641755693a(22) =15850471389