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A119043 Triangular numbers composed of digits {0,1,7}. 2
1, 10, 171, 1711, 1770, 10011, 111117701071, 17170010070077710, 101711101707777771, 701000700077010700, 1701111717707771071, 10010107100007777700, 101770070070071771070, 170107111111710707070 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..14.

G. Resta, Tridigital Triangular Numbers

CROSSREFS

Cf. A000217, A058420, A119044. See A119033 for a table of cross-references.

Sequence in context: A120977 A034830 A098345 * A187204 A133273 A239763

Adjacent sequences:  A119040 A119041 A119042 * A119044 A119045 A119046

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, May 10 2006

STATUS

approved

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Last modified August 18 15:00 EDT 2019. Contains 326106 sequences. (Running on oeis4.)