99649

Appears in sequences

• arctan(sec(x)*arctan(x))=x-1/3!*x^3+33/5!*x^5-1377/7!*x^7+99649/9!*x^9...at n=4A012805
• Expansion of e.g.f. log(cosh(x) + arctanh(x)).at n=9A013192
• a(n) = floor( n^Pi ).at n=38A061294
• Let F(x) = 1 + x + 4x^2 + 9x^3 + ... = g.f. for A002835 (solid partitions restricted to two planes) and write F(x) = 1/Product_{n>=1} (1-x^n)^a(n).at n=32A080207
• Semiprimes with only semiprime digits, each appearing at least once.at n=51A349275