45457

Appears in sequences

• Expansion of e.g.f. tan(x)/cosh(sin(x)), odd powers only.at n=4A009761
• a(n) = Sum{T(i,j)}, 0<=i<=n, 0<=j<=i, T given by A026714.at n=12A026723
• Floor(average of first n factorials).at n=8A078619
• Number of permutations of length n which avoid the patterns 1243, 2341, 4321.at n=18A116825
• Semiprimes whose decimal representation has only digits in {4,5,7}.at n=43A217124