64640

Appears in sequences

• Expansion of log(1+sin(x)*cos(x)).at n=9A009338
• arctan(arctan(arctanh(x)))=x-2/3!*x^3+32/5!*x^5-944/7!*x^7+64640/9!*x^9...at n=4A012233
• arctanh(cos(x)*sin(x))=x-2/3!*x^3-40/5!*x^5+208/7!*x^7+64640/9!*x^9...at n=4A012477
• Expansion of e.g.f. log(sec(x) + sin(x)).at n=9A013194
• Second diagonal of A027516.at n=15A027520
• Number of fusenes with 25 hexagons, C_(2v) symmetry and containing n carbon atoms.at n=13A123598
• Number of j-sets in symmetric group S_n.at n=19A125548
• Expansion of x/(1 - x^2 - 2*x^5 - x^8 - x^10 - x^12).at n=37A143375
• Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7.at n=6A252674
• Number of (7+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7.at n=2A252686
• a(n) = 4*(n - 1)*(16*n - 23) for n >= 1.at n=32A304378