0,2

-24*a(n)^2 + b(n)^2 = 25, with the companion sequence b(n)= A077411(n).

Index entries for sequences related to Chebyshev polynomials.

a(2*k)= A077251(k) and a(2*k+1)= A077249(k), k>=0.

a(n)= sqrt((A077411(n)^2 - 25)/24).

G.f.: (1+x)*(1+x+x^2)/(1-10*x^2+x^4).

24*a(2)^2 + 25 = 24*12^2 + 25 = 3481 = 59^2 = A077411(2)^2.

Sequence in context: A053890 A053896 A155890 this_sequence A063599 A163479 A017293

Adjacent sequences: A077407 A077408 A077409 this_sequence A077411 A077412 A077413

nonn,easy

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