Composite numbers m such that (4^m - 2^m + 8*m^2 - 2) / (2*m*(2*m + 1)) is an integer.

Terms

a(0) =243a(1) =891a(2) =1539a(3) =2211a(4) =2511a(5) =13203a(6) =19683a(7) =87723a(8) =92583a(9) =150851a(10) =202851a(11) =292923a(12) =321651a(13) =399771a(14) =412623a(15) =452051a(16) =1325843a(17) =1330551a(18) =1441091a(19) =1566891a(20) =3026871a(21) =4422231a(22) =4954851a(23) =4974971a(24) =5016191a(25) =5845851a(26) =5971239a(27) =6773139a(28) =11050911a(29) =11720511