a(n) = p(1,n), where p(x,n) is the strong divisibility sequence of polynomials based on sqrt(2) as in A327320.

A329006

a(n) = p(1,n), where p(x,n) is the strong divisibility sequence of polynomials based on sqrt(2) as in A327320.

Terms

    a(0) =1a(1) =5a(2) =7a(3) =85a(4) =341a(5) =455a(6) =5461a(7) =21845a(8) =9709a(9) =349525a(10) =1398101a(11) =1864135a(12) =22369621a(13) =89478485a(14) =119304647a(15) =1431655765a(16) =5726623061a(17) =2545165805a(18) =91625968981a(19) =366503875925a(20) =488671834567

External references