A013267 cosh(log(x+1)-sinh(x))=1+3/4!*x^4-10/5!*x^5+100/6!*x^6-693/7!*x^7...

1, 0, 0, 0, 3, -10, 100, -693, 6013, -54612, 556134, -6130575, 73843539, -960445902, 13455039728, -201847162125, 3229894901881, -54909246089576, 988382345047626, -18779319891598203, 375587262559207119