A119176 Triangular numbers composed of digits {2,6,9}.

6, 66, 666, 2926, 29962999696266, 226966926929226, 9996922966699222296, 296292269222296622226, 22266696966226666966622226, 266669269626696962299266226222926

Offset: 1

Author

Giovanni Resta, May 10 2006

Keywords

• nonn
• base
• more

Comments

a(11) > 10^40. - Tyler Busby, Mar 28 2023

Links

• Giovanni Resta, Tridigital Triangular Numbers.

Crossrefs

Cf. A000217, A053931, A119177. See A119033 for a table of cross-references.

Formula

a(n) = A000217(A119177(n)). - Tyler Busby, Mar 28 2023

Extensions

a(10) from Tyler Busby, Mar 28 2023