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A225928 a(n) = 4*16^n + 8*4^n + 17. 11
29, 113, 1169, 16913, 264209, 4202513, 67141649, 1073872913, 17180393489, 274880004113, 4398054899729, 70368777732113, 1125900041060369, 18014399046352913, 288230378299195409, 4611686027017322513, 73786976329197944849, 1180591620854850256913 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
COMMENTS
Number of conjugacy classes in Ree group 2F4(2*4^n).
LINKS
FORMULA
G.f.: 17/(1-x) + 8/(1-4x) + 4/(1-16x).
a(n) = 21*a(n-1) - 84*a(n-2) + 64*a(n-3) for n > 2. - Wesley Ivan Hurt, Oct 08 2017
MATHEMATICA
LinearRecurrence[{21, -84, 64}, {29, 113, 1169}, 20] (* Harvey P. Dale, May 06 2016 *)
PROG
(Sage) [4*16^n + 8*4^n + 17 for n in [0..20]]
(PARI) a(n)=4*16^n+8*4^n+17 \\ Charles R Greathouse IV, May 22 2013
CROSSREFS
Sequence in context: A201602 A050527 A254413 * A097461 A244635 A042646
KEYWORD
nonn,easy
AUTHOR
Eric M. Schmidt, May 21 2013
STATUS
approved

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Last modified April 17 13:58 EDT 2024. Contains 371764 sequences. (Running on oeis4.)