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A119078 Numbers k such that the k-th triangular number contains only digits {0,4,9}. 2
44, 2831780, 1407437419, 140715344155 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Next term exceeds 1.4*10^16.
LINKS
Table of n, a(n) for n=1..4.
G. Resta, Tridigital Triangular Numbers
CROSSREFS
Cf. A000217, A119077. See A119034 for a table of cross-references.
Sequence in context: A277840 A172828 A115734 * A172878 A001782 A172910
Adjacent sequences: A119075 A119076 A119077 * A119079 A119080 A119081
KEYWORD
nonn,base,more
AUTHOR
Giovanni Resta, May 10 2006
STATUS
approved

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Last modified May 13 01:02 EDT 2024. Contains 372497 sequences. (Running on oeis4.)