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A013815
a(n) = 21^(4*n + 3).
1
9261, 1801088541, 350277500542221, 68122318582951682301, 13248496640331026125580781, 2576580875108218291929075869661, 501096025171921401632658604207540941, 97453656071460446110921078004886769746621, 18952884486433699020098042171468383867092598701
OFFSET
0,1
MATHEMATICA
NestList[194481#&, 9261, 10] (* Harvey P. Dale, May 11 2018 *)
PROG
(Magma) [21^(4*n+3): n in [0..15]]; // Vincenzo Librandi, Jul 07 2011
CROSSREFS
Sequence in context: A184211 A035910 A202466 * A013900 A100696 A225024
KEYWORD
nonn,easy
STATUS
approved