sech(arctan(x)*log(x+1)) = 1 - 12/4!*x^4 + 60/5!*x^5 - 90/6!*x^6 + 420/7!*x^7...

A012407

sech(arctan(x)*log(x+1)) = 1 - 12/4!*x^4 + 60/5!*x^5 - 90/6!*x^6 + 420/7!*x^7...

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =-12a(5) =60a(6) =-90a(7) =420a(8) =-4928a(9) =-32256a(10) =788760a(11) =-4052400a(12) =12074568a(13) =-397549152a(14) =2860681824a(15) =80960836320

External references