17956864domain: NAppears in sequencesa(n) = 2^n*(binomial(n,2) + 1).at n=17A052481a(n) = 2^n*(3*n^2 + 13*n + 8)/8.at n=17A136530Number of solutions to Sum_{i=1...n} x_i^2 == 1 (mod 8) with x_i in 0..7.at n=8A229138