a(n) = (u+1)^n + (-s-1)^n + (t+1)^n + (-1)^n + (-t+1)^n + (s-1)^n + (-u+1)^n where s = sqrt(2), t = sqrt(2-s), u = sqrt(2+s).

A215503

a(n) = (u+1)^n + (-s-1)^n + (t+1)^n + (-1)^n + (-t+1)^n + (s-1)^n + (-u+1)^n where s = sqrt(2), t = sqrt(2-s), u = sqrt(2+s).

Terms

    a(0) =7a(1) =1a(2) =19a(3) =13a(4) =111a(5) =121a(6) =763a(7) =1093a(8) =5575a(9) =9697a(10) =42099a(11) =84173a(12) =324591a(13) =717081a(14) =2538331a(15) =6023173a(16) =20049671a(17) =50079553a(18) =159514963a(19) =413387789a(20) =1275778031a(21) =3394968121a(22) =10242581819a(23) =27780675397a(24) =82461727687a(25) =226743641121a(26) =665232392883

External references