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A279310 Numerators of coefficients in expansion of (cos x)/(1 - x - x^2). 2
1, 1, 3, 5, 97, 157, 7619, 12329, 124121, 1807513, 263214179, 425890349, 90961797697, 29435864753, 1313384366851, 70128321031313, 2475709202997731, 44063598280490161, 21816698251120351811, 35300159324950341077, 7234801959635621099147, 2065792142493411347453 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
EXAMPLE
(1/1) + (1/1)x + (3/2)x^2 + (5/2)x^3 + ... ; 1/1, 1/1, 3/2, 5/2, ... = A279310/A279311.
MATHEMATICA
z = 30; t = CoefficientList[Series[Cos[x]/(1 - x - x^2), {x, 0, z}], x];
Numerator[t] (* A279310 *)
Denominator[t] (* A279311 *)
CROSSREFS
Cf. A279311.
Sequence in context: A057663 A056244 A173487 * A364549 A103081 A338269
KEYWORD
nonn,easy,frac
AUTHOR
Clark Kimberling, Dec 11 2016
STATUS
approved

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)