A028683 Pseudo Galois numbers for d=21.

1, 420, 81496800, 6988909668048000, 264339188251171547754240000, 4409145118315866486641282521305984000000, 32432910584848683243891703579686352553931989191680000000

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..27

Formula

a(n) = d^n * product(d^n - d^k, k=0..n-1).

Mathematica

FoldList[ #1*21^#2 (21^#2-1)&, 1, Range[ 20 ] ]

Crossrefs

Sequence in context: A046167 A059951 A225992 * A198163 A014890 A159589

Adjacent sequences: A028680 A028681 A028682 * A028684 A028685 A028686

Keyword

nonn

Author

Olivier Gérard

Status

approved