34988647

Appears in sequences

• Expansion of e.g.f. sqrt(sec(sqrt(2)*x)), showing coefficients of only the even powers of x.at n=6A126156
• Numerators of a Taylor series expansion of 1/sqrt(cosh(x)) (even powers only).at n=6A190195
• Triangle read by rows. T(n, k) = 1 if k = 0, equals T(n, k-1) if k = n, and otherwise is (n - k + 1) * (2 * (n - k) + 1) * T(n, k - 1) + T(n - 1, k).at n=26A365672
• Triangle read by rows. T(n, k) = 1 if k = 0, equals T(n, k-1) if k = n, and otherwise is (n - k + 1) * (2 * (n - k) + 1) * T(n, k - 1) + T(n - 1, k).at n=27A365672
• Main diagonal of A365673.at n=6A366137