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A119077
Triangular numbers composed of digits {0,4,9}.
2
990, 4009490400090, 990440044904409490, 9900404040400404004090
OFFSET
1,1
COMMENTS
a(5) > 10^40. - Tyler Busby, Mar 28 2023
FORMULA
a(n) = A000217(A119078(n)). - Tyler Busby, Mar 28 2023
CROSSREFS
Cf. A000217, A058444, A119078. See A119033 for a table of cross-references.
Sequence in context: A295433 A068301 A119095 * A119057 A218401 A053393
KEYWORD
nonn,base,more
AUTHOR
Giovanni Resta, May 10 2006
STATUS
approved