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.

A119206 Triangular numbers composed of digits {4,5,8}.

Original entry on oeis.org

45, 55, 48555585, 84844484544485445, 44585455858455488585854455, 445544585455555888554444445, 455888444844584444558845455, 5858855485848545848448855845485
Offset: 1

Views

Author

Giovanni Resta, May 10 2006

Keywords

Comments

a(9) > 10^40. - Tyler Busby, Mar 29 2023

Links

Crossrefs

Cf. A000217, A053953, A119207. See A119033 for a table of cross-references.

Formula

a(n) = A000217(A119207(n)). - Jon E. Schoenfield, Mar 27 2023

A053952 Numbers k such that k^2 contains only digits {4,5,8}.

Original entry on oeis.org

2, 22, 76478, 210828, 6968112, 235763622, 236323603452022, 767175898056538, 293061185503724726684202222622
Offset: 1

Views

Author

Patrick De Geest, Mar 15 2000

Keywords

Links

Crossrefs

Cf. A053953.

Extensions

Two more terms from Mishima's page added by Max Alekseyev, Apr 12 2009
a(9) from Zhao Hui Du, Mar 09 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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