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.

A119095 Triangular numbers composed of digits {0,8,9}.

Original entry on oeis.org

990, 809809890, 89909089088809980, 98899080989088808000999800
Offset: 1

Views

Author

Giovanni Resta, May 10 2006

Keywords

Comments

a(5) > 10^41. - Tyler Busby, Mar 28 2023

Links

Crossrefs

Cf. A000217, A058456, A119096. See A119033 for a table of cross-references.

Formula

a(n) = A000217(A119096(n)). - Tyler Busby, Mar 28 2023

A058455 Numbers k such that k^2 contains only digits {0,8,9}, not ending with zero.

Original entry on oeis.org

3, 283, 301345331969667, 299831600904572582192518303
Offset: 1

Views

Author

Patrick De Geest, Nov 15 2000

Keywords

Links

Crossrefs

Cf. A058456.

Extensions

a(4) from Zhao Hui Du, Feb 28 2024
Showing 1-2 of 2 results.

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

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