-1798

Appears in sequences

• sech(sinh(x)+tan(x))=1-4/2!*x^2+56/4!*x^4-1798/6!*x^6+107880/8!*x^8...at n=3A013055
• Expansion of 1/(1+x^2-2*x^3).at n=27A077912
• a(n) = (-n^3 + 9n^2 - 5n + 3)/3.at n=21A161702
• Expansion of Product_{k>=1} 1 / (1 + 3^(k-1)*x^k).at n=9A352762