A012294 sech(sin(x)*exp(x))=1-1/2!*x^2-6/3!*x^3-15/4!*x^4+60/5!*x^5...

1, 0, -1, -6, -15, 60, 1023, 6062, -9247, -652680, -7332289, -13792350, 994947921, 19248140340, 119312444223, -2747842718122, -91993600741951, -1070543140984080, 10423240065585023, 710021632610736714