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A119099 Triangular numbers composed of digits {1,2,4}. +0
3
1, 21, 2211, 222111, 1422141, 4244241, 22221111, 44241121, 124212441, 2222211111, 222222111111, 22222221111111, 1111114242224421, 2222222211111111, 21414424114444221, 222222222111111111 (list; graph; listen)
OFFSET

1,2
LINKS

G. Resta, Tridigital Triangular Numbers

CROSSREFS

Cf. A000217, A053881, A119100. See A119033 for a table of cross-references.

Sequence in context: A163928 A153848 A007593 this_sequence A033510 A123844 A068254

Adjacent sequences: A119096 A119097 A119098 this_sequence A119100 A119101 A119102

KEYWORD

nonn,base

AUTHOR

Giovanni Resta (g.resta(AT)iit.cnr.it), May 10 2006

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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