A119059 Triangular numbers composed of digits {0,3,4}.

3, 300, 3003, 3403, 3444000, 344334403, 433430403, 3434340003, 4033034303403, 3430000044444403, 4333004330434300, 300034434334030003, 333343033034040030, 44400033434030304430, 3340004334430334340000, 30340003004344033440000, 4430044300033330340443003

Offset: 1

Author

Giovanni Resta, May 10 2006

Keywords

• nonn
• base

Links

• Giovanni Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A058430, A119060. See A119033 for a table of cross-references.

Formula

a(n) = A000217(A119060(n)). - Michel Marcus, Mar 22 2023

Extensions

a(16)-a(17) from Tyler Busby, Mar 22 2023