Numbers that can be written as 2*a^2 - 1 and 3*b^3 - 1.

Terms

a(0) =-1a(1) =647a(2) =41471a(3) =472391a(4) =2654207a(5) =10124999a(6) =30233087a(7) =76236551a(8) =169869311a(9) =344373767a(10) =647999999a(11) =1147971527a(12) =1934917631a(13) =3127772231a(14) =4879139327a(15) =7381124999a(16) =10871635967a(17) =15641144711a(18) =22039921151a(19) =30485730887a(20) =41471999999a(21) =55576446407a(22) =73470177791a(23) =95927256071a(24) =123834728447