cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-1 of 1 results.

A011778 Numbers k where A011776(k) grows.

Original entry on oeis.org

2, 6, 12, 24, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 480, 630, 672, 720, 1080, 1120, 1260, 1344, 1440, 1890, 2016, 2160, 2240, 2520, 2880, 3024, 3360, 3780, 4032, 4320, 5040, 6048
Offset: 1

Views

Author

Keywords

Comments

Equivalently, 2 along with numbers A092427(j) where A092427(j) > A092427(j-1), for j > 0. - Derek Orr, Apr 16 2015
Is 45 the only odd number in this sequence? - Derek Orr, Apr 16 2015
a(184) = 212837625 and a(311) = 638512875 are the only other odd terms < 10^11. - Charlie Neder, Jan 27 2019

References

  • Ivan Niven, Herbert S. Zuckerman and Hugh L. Montgomery, An Introduction to the Theory Of Numbers, Fifth Edition, Wiley NY 1991.
  • J. Roberts, Lure of the Integers, Math. Assoc. America, 1992, p. 251.

Crossrefs

Formula

a(n) = A061769(n) + 1.
a(n) = A092427(A061770(n)). - Derek Orr, Apr 16 2015

Extensions

Corrected by Vladeta Jovovic, Dec 01 2002
Showing 1-1 of 1 results.