A119180 Triangular numbers composed of digits {2,8,9}.

28, 828828, 9298828, 99228828, 2882992822228828, 88992922889298828, 299282229288828999298828

Offset: 1

Author

Giovanni Resta, May 10 2006

Keywords

• nonn
• base
• more

Comments

a(8) > 10^40. - Tyler Busby, Mar 29 2023

Links

• Giovanni Resta, Tridigital Triangular Numbers.

Crossrefs

Cf. A000217, A053935, A119181. See A119033 for a table of cross-references.

Formula

a(n) = A000217(A119181(n)). - Tyler Busby, Mar 29 2023