365905

Appears in sequences

• Expansion of log(1+sinh(tanh(x))).at n=11A009349
• arcsin(tan(tanh(x)))=x+1/3!*x^3+1/5!*x^5+169/7!*x^7+5857/9!*x^9...at n=5A012170
• Expansion of e.g.f. exp(x/(1 - x^3)).at n=9A293493
• Expansion of e.g.f. exp(x) / (1 - x^4).at n=9A330045
• a(n) = (4*n+1)! * Sum_{k=0..n} 1 / (4*k+1)!.at n=2A337728
• a(n) = n! * Sum_{k=0..floor((n-1)/4)} 1 / (4*k+1)!.at n=9A349089