A symmetrical triangle sequence made from A154537:q(x,n)= Sum[(2*m + 1)^n*x^m/m!, {m, 0, Infinity}]/(Exp[x]); p(x,n)=q(x,n)+x^n*q(1/x,n); t(n,m)=coefficients(p(x,n)).

A154923

A symmetrical triangle sequence made from A154537:q(x,n)= Sum[(2*m + 1)^n*x^m/m!, {m, 0, Infinity}]/(Exp[x]); p(x,n)=q(x,n)+x^n*q(1/x,n); t(n,m)=coefficients(p(x,n)).

Terms

    a(0) =2a(1) =3a(2) =3a(3) =5a(4) =16a(5) =5a(6) =9a(7) =62a(8) =62a(9) =9a(10) =17a(11) =208a(12) =464a(13) =208a(14) =17a(15) =33a(16) =642a(17) =2680a(18) =2680a(19) =642a(20) =33a(21) =65a(22) =1880a(23) =13404a(24) =24320a(25) =13404a(26) =1880a(27) =65a(28) =129a(29) =5322

External references