74944

Appears in sequences

• Expansion of exp(x)/cos(sinh(x)).at n=9A009290
• Expansion of e.g.f. sin(x)/cosh(sin(x)) (odd powers only).at n=4A009558
• Sum of previous term and preceding relatively prime terms.at n=23A119746
• Sum of the principal diagonals of a 2n X 2n square spiral.at n=24A137931
• Coefficients of polynomials (in descending powers of x) P(n,x) := 1 + P(n-1,x)^2, where P(1,x) = x + 1.at n=28A158985
• Number of 5-step left-handed knight's tours (moves only out two, left one) on an n X n board summed over all starting positions.at n=31A187175
• Numbers k such that (8*10^k + 49)/3 is prime.at n=36A270890
• Irregular triangular array, read by rows: row n shows the coefficients of the polynomial p(n,x) defined in Comments.at n=27A329429