A119192 Triangular numbers composed of digits {3,5,9}.

3, 55, 595, 5995, 33533955, 5939355555, 9993335593335, 535555935535935, 599593353353393939939955, 595993553593935939553359535599399555

Offset: 1

Author

Giovanni Resta, May 10 2006

Keywords

• nonn
• base
• more

Comments

a(11) > 10^39. - Tyler Busby, Mar 29 2023

Links

• Giovanni Resta, Tridigital Triangular Numbers.

Crossrefs

Cf. A000217, A119193. See A119033 for a table of cross-references.

Formula

a(n) = A000217(A119193(n)).

Extensions

a(10) from Max Alekseyev, May 21 2011