Positions in A181391 where the terms listed in A171863 appear.

Terms

a(0) =1a(1) =3a(2) =5a(3) =20a(4) =66a(5) =148a(6) =173a(7) =324a(8) =471a(9) =539a(10) =548a(11) =621a(12) =670a(13) =1486a(14) =2109a(15) =2693a(16) =3735a(17) =7574a(18) =7619a(19) =7886a(20) =13191a(21) =15116a(22) =24862a(23) =27717a(24) =29981a(25) =31679a(26) =45110a(27) =59597a(28) =60876a(29) =65607