来自在线整数百科全书的问候语!http://oeis.org/ Search: id:a245139 Showing 1-1 of 1 %I A245139 %S A245139 1,2,4,14,64,602,5344,58214,661504,9666482,145897984,2611988414, %T A245139 47548524544,1002692887562,21581168410624,527328466446614, %U A245139 13084553110749184,362312592419199842,10175324275879051264,315223836841156264814,9889646730551557095424,338 833077.895898989699322%%N A245139 E.G.F:(COSH(2×x)+SnH(2×x)*COSH(x))/SqRT(1 - Snh(x)^ 2×SnH(2×x)^ 2).%C24A55139极限(A(n)/n!)^(-1/n)=log(t)=0.609377863436…其中T是TrimoNeCi常数,满足1 +t+t^ 2=t^ 3 .f %A245139 E.G.F.:G(x)*(COSH(x)-SnH(x)*COSH(2×x))/Sqr(1 -正弦(x)^ 2×SnH(2×x)^ 2),其中G(x)是A245140.E.A.A245139 E.G.F.:A(x)=1+2×x+4*x ^ 2/2!+ 14×x ^ 3/3!+ 64×x ^ 4/4!+ 602×x ^ 5/5!+….% %E A245139让A(x)=A0(x)+A1(x),其中εe A245139 A0(x)=1+4×x ^ 2/2;+ 64×x ^ 4/4!+ 5344×x ^ 6/6!+ 661504×x ^ 8/8!+……% %A245139 A1(x)=2×x+14×x ^ 3/3!+ 602×x ^ 5/5!+ 58214×x ^ 7/7!+ 9666482×x ^ 9/9!+……%AE A245139,然后A0(x)^ 2 -A1(x)^ 2=1。+ 330×x ^ 5/5!+ 21966×x ^ 7/7!+ 3507090×x ^ 9/9!+ 844747926×x ^ 11/11!+ 299180549850×x ^ 13/13!+(…)%AE A245139,因此A(x)*A(-x)=1。%AO A245139(PARI){A(n)=局部(x= x+x^ 2×O(x^ n));n!)(n=0,30,Prrt1(a(n),”,())=a245139,A245138,A245140,A245154,A245165..%%K A245139,NN,%A245139,2,%,A245139,PL D HANAAY,7月12日2014‰的内容在OEIS最终用户许可协议下可用:HTTP:/OEIS.Org/许可证(COSH(2×x)+SnH(2×x)*COSH(x))/SqRT(1 - Snh(x)^ 2×Snh(2×x)