Expansion of log(1+log(1+x)*cosh(x)).

Terms

a(0) =0a(1) =1a(2) =-2a(3) =10a(4) =-53a(5) =373a(6) =-3289a(7) =34543a(8) =-421994a(9) =5884933a(10) =-92255061a(11) =1606210571a(12) =-30754222080a(13) =642299748231