First occurrence of n in A093723, or -1 if n does not occur.

Terms

a(0) =109a(1) =1a(2) =34a(3) =2a(4) =6a(5) =11a(6) =5a(7) =26a(8) =35a(9) =17a(10) =13a(11) =33a(12) =75a(13) =21a(14) =55a(15) =24a(16) =68a(17) =45a(18) =79a(19) =148a(20) =202a(21) =236a(22) =261a(23) =230a(24) =193a(25) =330a(26) =481a(27) =524a(28) =771a(29) =227