-2170domain: ZAppears in sequencesE.g.f.: cos(arctanh(x)*exp(x))=1-1/2!*x^2-6/3!*x^3-31/4!*x^4-140/5!*x^5...at n=7A012714Riordan array (1-4x, x(1-x)^3).at n=62A119305Coefficients in the expansion of B^7/C, in Watson's notation of page 118.at n=50A160534a(n) = coefficient of x^n*y^n in Product_{n>=1} (1 - (x^n + y^n)).at n=76A322213