Chebyshev even-indexed U-polynomials evaluated at sqrt(7)/2.

A030221

Chebyshev even-indexed U-polynomials evaluated at sqrt(7)/2.

Terms

    a(0) =1a(1) =6a(2) =29a(3) =139a(4) =666a(5) =3191a(6) =15289a(7) =73254a(8) =350981a(9) =1681651a(10) =8057274a(11) =38604719a(12) =184966321a(13) =886226886a(14) =4246168109a(15) =20344613659a(16) =97476900186a(17) =467039887271

External references