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 1-2 of 2 results.

A158273 Indices of single-digit numbers in A061049.

Original entry on oeis.org

8, 10, 12, 16, 24, 40, 56, 72, 120, 136
Offset: 1

Views

Author

Paul Curtz, Mar 15 2009

Keywords

Comments

The sequence may be finite. There are no further terms between 136 and 6000000.

Formula

A061049(a(n)) = A158270(n).

Extensions

Edited by R. J. Mathar, Apr 04 2009

A158650 Indices of single-digit numbers in A061041.

Original entry on oeis.org

4, 5, 6, 8, 12, 20, 28, 36
Offset: 1

Views

Author

Paul Curtz, Mar 23 2009

Keywords

Comments

The single-digit numbers are 0,9,5,3,1,3,3,5, to be compared with A158270.
From formula A061041(n) = (n^2-16) / gcd(n-4,16)^2, this list is complete. - Franklin T. Adams-Watters, Sep 25 2011.

Crossrefs

Cf. A061041.

Formula

{k: A061041(k)<10}.

Extensions

Edited and extended by R. J. Mathar, Apr 04 2009
Showing 1-2 of 2 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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