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.

A119210 Triangular numbers composed of digits {4,6,7}.

Original entry on oeis.org

6, 66, 666, 476776, 764466, 4646676, 464774774646, 667474767766464747666467446, 7666777767444444644744476476, 44774674766666676747766477446
Offset: 1

Views

Author

Giovanni Resta, May 10 2006

Keywords

Comments

a(11) > 10^40. - Tyler Busby, Mar 29 2023

Links

Crossrefs

Cf. A000217, A053957, A119211. See A119033 for a table of cross-references.

Formula

a(n) = A000217(A119211(n)). - Michel Marcus, Mar 27 2023

A053956 Numbers k such that k^2 contains only digits {4,6,7}.

Original entry on oeis.org

2, 8, 26, 88, 2108238, 8165033238, 876154475408, 2538991467974, 2728823494615908, 253863101778786762, 815277035409723028858892
Offset: 1

Views

Author

Patrick De Geest, Mar 15 2000

Keywords

Links

Crossrefs

Cf. A053957.

Extensions

More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005
One more term from Jon E. Schoenfield, Sep 04 2006
Three more terms from Mishima's website added by Max Alekseyev, May 07 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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