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A092837 Indices of terms in the series for sec(x) that have prime numerators. 0
2, 3, 4, 19, 24, 227, 255, 443, 1381, 3329, 3817, 3947 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..12.

Eric Weisstein's World of Mathematics, Secant

MATHEMATICA

f[n_] := Numerator[EulerE[2n]/(2n)! ]; Do[If[PrimeQ[f[n]], Print[n]], {n, 3329}] (* Ryan Propper, Apr 01 2007 *)

CROSSREFS

Cf. A092838.

Sequence in context: A265902 A245453 A067805 * A058772 A227941 A250259

Adjacent sequences:  A092834 A092835 A092836 * A092838 A092839 A092840

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein, Mar 07 2004

EXTENSIONS

More terms from Ryan Propper, Apr 01 2007, May 11 2007

STATUS

approved

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Last modified October 16 20:36 EDT 2021. Contains 348047 sequences. (Running on oeis4.)