E.g.f.: sech(log(x+1)-tanh(x))=1-3/4!*x^4+40/5!*x^5-250/6!*x^6+1008/7!*x^7...

A013293

E.g.f.: sech(log(x+1)-tanh(x))=1-3/4!*x^4+40/5!*x^5-250/6!*x^6+1008/7!*x^7...

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =-3a(5) =40a(6) =-250a(7) =1008a(8) =-5887a(9) =56880a(10) =-263724a(11) =-1848000a(12) =36228093a(13) =-377490984a(14) =7141572490a(15) =-132772794000

External references