Position of first occurrence of n in A182535.

Terms

a(0) =1a(1) =4a(2) =7a(3) =16a(4) =45a(5) =74a(6) =166a(7) =529a(8) =866a(9) =1993a(10) =4560a(11) =9907a(12) =27425a(13) =62894a(14) =161134a(15) =386007a(16) =1308165a(17) =2363223a(18) =7190239a(19) =17844411a(20) =54259731a(21) =90564740a(22) =308061971a(23) =487568736a(24) =1422102892a(25) =3573737940a(26) =8516241133a(27) =22686128280a(28) =77770540116a(29) =144783290133