OFFSET
0,1
COMMENTS
c^n = 7*A(-(n+1)) + A(-n)*phi29, for n >= 0, where phi29 = A223140, and A(-n) = A015442(-n) = sqrt(-7)^(-(n+1))*S(-(n+1), 1/sqrt(-7)) = -(i/sqrt(7))^(n+1)*S(n-1, i/sqrt(7)), with i = sqrt(-1) and the S-Chebyshev polynomials (see A049310), where S(-n, x) = -S(n-2, x), for n >= 1, and S(n, -x) = (-1)^n*S(n, x).
FORMULA
c = 1/phi29 = (-1 + phi(29))/7, with phi29 = A223140.
EXAMPLE
c = 0.3132260576524645736607650351100235397353657258317706312628...
MATHEMATICA
Flatten[First[RealDigits[(-1 + Sqrt[29])/14, 10, 96]]] (* Stefano Spezia, Jan 05 2024 *)
CROSSREFS
KEYWORD
AUTHOR
Wolfdieter Lang, Jan 05 2024
STATUS
approved