Sum of 2^k for residue k in among Lucas numbers mod n.

Terms

a(0) =1a(1) =3a(2) =7a(3) =15a(4) =30a(5) =63a(6) =127a(7) =190a(8) =511a(9) =990a(10) =1183a(11) =3582a(12) =8190a(13) =16383a(14) =18590a(15) =47806a(16) =131070a(17) =247967a(18) =298911a(19) =854686a(20) =1453502a(21) =2423967a(22) =8362495a(23) =10366142a(24) =31738014a(25) =67100670a(26) =134217727a(27) =262073758a(28) =302254239a(29) =609175710