A012970 sec(arctan(x)+log(x+1))=1+4/2!*x^2-6/3!*x^3+83/4!*x^4-460/5!*x^5...

1, 0, 4, -6, 83, -460, 5470, -53130, 722585, -9842040, 159135400, -2720898950, 51918624875, -1059369023700, 23452521576250, -553824975590250, 13985888446648625, -374715350908366000, 10638956635471235500