The Gegenbauer Polynomial of index n, order 1, evaluated at x=1/3 and multiplied by n*3^n/2.

A025173

The Gegenbauer Polynomial of index n, order 1, evaluated at x=1/3 and multiplied by n*3^n/2.

Terms

    a(0) =0a(1) =1a(2) =-5a(3) =-42a(4) =-22a(5) =575a(6) =1677a(7) =-3332a(8) =-27740a(9) =-23859a(10) =259055a(11) =832370a(12) =-981714a(13) =-10980437a(14) =-13342175a(15) =85437240a(16) =319499912a(17) =-192522535a(18) =-3642631389a(19) =-5753449394a(20) =24313788850a(21) =108290637399a(22) =-13811840779

External references