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.

A119172 Triangular numbers composed of digits {2,6,7}.

Original entry on oeis.org

6, 66, 276, 666, 7626, 6666726, 77666666626, 2662627722726, 2777672627676766, 77772662277672726, 6622726277766676626, 672667762262676277666726
Offset: 1

Views

Author

Giovanni Resta, May 10 2006

Keywords

Comments

a(13) > 10^40. - Tyler Busby, Mar 29 2023

Links

Crossrefs

Cf. A000217, A058462, A119173. See A119033 for a table of cross-references.

Formula

a(n) = A000217(A119173(n)). - Tyler Busby, Mar 29 2023

A058461 Numbers k such that k^2 contains only digits {2,6,7}.

Original entry on oeis.org

26, 526, 1636345826, 512130136076, 150573163864701424
Offset: 1

Views

Author

Patrick De Geest, Nov 15 2000

Keywords

Links

Crossrefs

Cf. A058462.

Extensions

a(5) (from the Mishima web site) added by Max Alekseyev, Jan 11 2007
Showing 1-2 of 2 results.

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

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