A119184 Triangular numbers composed of digits {3,4,6}.

3, 6, 36, 66, 666, 333336, 3664664466, 66336663646, 3343646334464646, 334446636363634446, 346644344666643436, 3644434346644436366346, 4446663663333436343436, 664333446446364463633446, 436633343363366333434433646, 6336363664446634343634443466

Offset

1,1

Links

Table of n, a(n) for n=1..16.

Giovanni Resta, Tridigital Triangular Numbers

Formula

a(n) = A000217(A119185(n)). - Michel Marcus, Mar 15 2023

Crossrefs

Cf. A000217, A053939, A119185. See A119033 for a table of cross-references.

Sequence in context: A119194 A119198 A119196 * A350991 A084260 A076983

Adjacent sequences: A119181 A119182 A119183 * A119185 A119186 A119187

Keyword

nonn,base

Author

Giovanni Resta, May 10 2006

Extensions

a(15)-a(16) from Tyler Busby, Mar 15 2023

Status

approved