0,2

-8*a(n)^2 + b(n)^2 = 17, with the companion sequence b(n)= A077242(n).

Index entries for sequences related to Chebyshev polynomials.

a(2*k)= A054488(k) and a(2*k+1)= A077413(k), k>=0.

G.f.: (1+x)*(1+x+x^2)/(1-6*x^2+x^4).

8*a(2)^2 + 17 = 8*8^2+17 = 529 = 23^2 = A077242(2)^2.

Sequence in context: A037382 A095825 A106359 this_sequence A066567 A002248 A050619

Adjacent sequences: A077238 A077239 A077240 this_sequence A077242 A077243 A077244

nonn,easy

Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Nov 08 2002