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A119158
Triangular numbers composed of digits {2,4,5}.
2
45, 55, 25425, 255255, 22542255, 244525555, 2245524452445, 2445254445525, 5255545252454245, 444222245455224445, 4544525455555255444225, 5554545454254522254255544522452525245
OFFSET
1,1
COMMENTS
a(13) > 10^40.
FORMULA
a(n) = A000217(A119159(n)).
CROSSREFS
Cf. A000217, A031152, A119159. See A119033 for a table of cross-references.
Sequence in context: A119208 A068812 A119071 * A119204 A119206 A060463
KEYWORD
nonn,base,more
AUTHOR
Giovanni Resta, May 10 2006
EXTENSIONS
a(12) from Max Alekseyev, Aug 19 2013
STATUS
approved