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A119236 Triangular numbers composed of digits {7,8,9}. 2
78, 8778, 887778, 88877778, 8888777778, 777887999778, 888887777778, 7798988788878, 88888877777778, 8888888777777778, 888888887777777778, 88888888877777777778, 8888888888777777777778, 78879897887889899897778 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..14.

G. Resta, Tridigital Triangular Numbers

CROSSREFS

Cf. A000217, A058472, A119237. See A119033 for a table of cross-references.

Sequence in context: A268016 A077694 A119216 * A126998 A299712 A159402

Adjacent sequences:  A119233 A119234 A119235 * A119237 A119238 A119239

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, May 10 2006

STATUS

approved

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Last modified June 24 13:44 EDT 2021. Contains 345417 sequences. (Running on oeis4.)