A028687 - OEIS

A028687

Sorted k-factorial numbers (numbers of form k-1 excluded).

1, 3, 16, 21, 45, 96, 175, 288, 315, 416, 441, 640, 891, 1200, 1573, 2016, 2535, 2835, 3136, 3825, 4608, 5491, 6480, 7581, 8800, 9765, 10143, 11616, 11904, 13225, 14976, 16875, 18928, 21141, 23520, 26071, 28800, 31713, 33280, 34816, 37625

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OFFSET

1,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..200 (n = 42..200 corrected by Sean A. Irvine)

Index entries for sequences related to factorial numbers

Sean A. Irvine, Java program (github)

FORMULA

The set { Product_{j=1..m} (k^j-1) for integers m > 1 and k > 1 }. - Sean A. Irvine, Feb 11 2020

CROSSREFS

Cf. A028688.

Sequence in context: A031071 A346072 A218625 * A201274 A375711 A101132

Adjacent sequences: A028684 A028685 A028686 * A028688 A028689 A028690

KEYWORD

nonn

AUTHOR

Olivier Gérard

EXTENSIONS

Offset corrected by Sean A. Irvine, Feb 11 2020

STATUS

approved