8583168

Appears in sequences

• q(n) = sigma(n) - n, where q(n) = n + e(n) + e(n-e(n)) and e(n) = n - eulerphi(n).at n=6A063935
• E.g.f. A = A(x,m) satisfies: cn(A + x, m) + sn(A - x, m) = 1, where sn(x,m) and cn(x,m) are Jacobi elliptic functions with parameter m, as an irregular triangle of coefficients read by rows.at n=18A319145