A119111 Triangular numbers composed of digits {1,3,4}.

1, 3, 1431, 33411, 331441131, 1444343131, 13113334431, 31444341333441, 111413314441131, 444334341314331, 11114441143333344141, 331341331134344133331, 4443314433131433343331311434133434431331

Offset: 1

Author

Giovanni Resta, May 10 2006

Keywords

• nonn
• base
• more

Comments

a(14) > 10^41. - Tyler Busby, Mar 27 2023

Links

• Giovanni Resta, Tridigital Triangular Numbers.

Crossrefs

Cf. A000217, A053891, A119112. See A119033 for a table of cross-references.

Formula

a(n) = A000217(A119112(n)). - Tyler Busby, Mar 27 2023

Extensions

a(13) from Tyler Busby, Mar 27 2023