A119095 Triangular numbers composed of digits {0,8,9}.

990, 809809890, 89909089088809980, 98899080989088808000999800

Offset: 1

Author

Giovanni Resta, May 10 2006

Keywords

• nonn
• base
• more

Comments

a(5) > 10^41. - Tyler Busby, Mar 28 2023

Links

• Giovanni Resta, Tridigital Triangular Numbers.

Crossrefs

Cf. A000217, A058456, A119096. See A119033 for a table of cross-references.

Formula

a(n) = A000217(A119096(n)). - Tyler Busby, Mar 28 2023