Binomial transform of expansion of cosh(sinh(x)).

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =36a(6) =128a(7) =456a(8) =1872a(9) =7888a(10) =37600a(11) =184064a(12) =990784a(13) =5444544a(14) =32333824a(15) =195982208a(16) =1272660224a(17) =8441139456a(18) =59527313920a(19) =428299217920