A028672 Pseudo Galois numbers for d=10.

1, 90, 891000, 890109000000, 89001998910000000000, 890011088900109000000000000000, 890010198889020099891000000000000000000000

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..31

Formula

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

Mathematica

FoldList[ #1*10^#2 (10^#2-1)&, 1, Range[ 20 ] ]

Crossrefs

Sequence in context: A066784 A135321 A135428 * A172650 A353038 A252093

Adjacent sequences: A028669 A028670 A028671 * A028673 A028674 A028675

Keyword

nonn

Author

Olivier Gérard

Status

approved