31712

Appears in sequences

• arcsin(arctan(x)+tan(x))=2*x+8/3!*x^3+328/5!*x^5+31712/7!*x^7...at n=3A012999
• Denominators of continued fraction convergents to sqrt(109).at n=10A041197
• a(n) = n^3 - n^2 - n.at n=32A152015
• a(n) = 961*n - 1.at n=32A158412
• Number of ways to place 2 nonattacking knights on an n X n cylindrical board.at n=15A172964
• a(n) = 2*n*3^(n-1) - (3^n-1)/2.at n=8A176177
• Total number of n-digit numbers requiring 2 positive biquadrates in their representation as sum of biquadrates.at n=9A186650
• Number of 5-element nondividing subsets of {1, 2, ..., n}.at n=28A187492
• Expansion of Product_{k>0} (1 + Sum_{m>0} x^(k*m!)).at n=50A304332
• G.f. = Phi^6, where Phi = g.f. for A028930.at n=15A328531
• Number of n-step self-avoiding walks on the upper half-plane of a 2D square lattice rotated by Pi/4.at n=11A348010
• a(n) = Sum_{k=0..floor(n/3)} 2^k * binomial(2*k,2*n-6*k).at n=20A387763