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A119172 Triangular numbers composed of digits {2,6,7}. 2
6, 66, 276, 666, 7626, 6666726, 77666666626, 2662627722726, 2777672627676766, 77772662277672726, 6622726277766676626, 672667762262676277666726 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
a(13) > 10^40. - Tyler Busby, Mar 29 2023
LINKS
Table of n, a(n) for n=1..12.
Giovanni Resta, Tridigital Triangular Numbers.
FORMULA
a(n) = A000217(A119173(n)). - Tyler Busby, Mar 29 2023
CROSSREFS
Cf. A000217, A058462, A119173. See A119033 for a table of cross-references.
Sequence in context: A133424 A045641 A071276 * A064167 A175455 A185253
Adjacent sequences: A119169 A119170 A119171 * A119173 A119174 A119175
KEYWORD
nonn,base,more
AUTHOR
Giovanni Resta, May 10 2006
STATUS
approved

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Last modified May 20 19:00 EDT 2024. Contains 372720 sequences. (Running on oeis4.)