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.

A119214 Triangular numbers composed of digits {4,6,9}.

Original entry on oeis.org

6, 66, 496, 666, 946, 4699966666944446964496
Offset: 1

Views

Author

Giovanni Resta, May 10 2006

Keywords

Comments

a(7) > 10^40. - Tyler Busby, Mar 29 2023

Links

Crossrefs

Cf. A000217, A053961, A119215. See A119033 for a table of cross-references.

Formula

a(n) = A000217(A119215(n)). - Michel Marcus, Mar 27 2023

A053960 Numbers k such that k^2 contains only digits {4,6,9}.

Original entry on oeis.org

2, 3, 7, 8, 212, 264, 2236, 3114, 3157, 31614, 68187, 254842, 80434114, 263527313, 3073591864, 6670791907, 21134016762, 21610059386, 97312381892, 22237232291063, 999997323321167445187, 22236561446627600040614, 9718263579193026119075264
Offset: 1

Views

Author

Patrick De Geest, Mar 15 2000

Keywords

Links

Crossrefs

Cf. A053961.

Extensions

More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 03 2005
a(20)-a(23) from Mishima's website, added by Max Alekseyev, Nov 30 2017
Showing 1-2 of 2 results.

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

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