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A119071 Triangular numbers composed of digits {0,4,5}. 2
45, 55, 4005, 5050, 404550, 405450, 500500, 40405555, 40504500, 50005000, 454044045, 500054500, 4050045000, 4540044405, 5000050000, 405000450000, 455005054540, 500000500000, 40500004500000, 50000005000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..20.

G. Resta, Tridigital Triangular Numbers

CROSSREFS

Cf. A000217, A058436, A119072. See A119033 for a table of cross-references.

Sequence in context: A037042 A119208 A068812 * A119158 A119204 A119206

Adjacent sequences:  A119068 A119069 A119070 * A119072 A119073 A119074

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, May 10 2006

STATUS

approved

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Last modified May 20 23:05 EDT 2022. Contains 353886 sequences. (Running on oeis4.)