A119049 Triangular numbers composed of digits {0,2,3}.

3, 300, 3003, 23220, 203203, 322003, 32020003, 333220020, 3200200003, 320002000003, 2330203323003, 32000020000003, 332003222232003, 2203322302033203, 3200000200000003, 320000002000000003, 32000000020000000003, 233200332233023303203, 3200000000200000000003

Offset

1,1

Links

Table of n, a(n) for n=1..19.

Giovanni Resta, Tridigital Triangular Numbers

Formula

a(n) = A000217(A119050(n)). - Michel Marcus, Mar 14 2023

Crossrefs

Cf. A000217, A119050. See A119033 for a table of cross-references.

Sequence in context: A119065 A119069 A119059 * A119067 A226500 A052505

Adjacent sequences: A119046 A119047 A119048 * A119050 A119051 A119052

Keyword

nonn,base

Author

Giovanni Resta, May 10 2006

Extensions

a(17)-a(19) from Tyler Busby, Mar 14 2023

Status

approved