A119203 - OEIS

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A119203

Numbers k such that the k-th triangular number contains only digits {4,5,6}.

2

3, 9, 10, 11, 30, 36, 94, 96, 105, 114, 305, 1043, 2988, 3303, 3363, 11363, 3021769, 3054388, 10627009, 33330030, 33330036, 33336636, 94302243, 115470036, 305177471, 336352955885, 330353339515569, 955663806624114

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..28.

G. Resta, Tridigital Triangular Numbers

CROSSREFS

Cf. A000217, A119202. See A119034 for a table of cross-references.

Sequence in context: A308421 A309349 A024574 * A115403 A282409 A059012

Adjacent sequences: A119200 A119201 A119202 * A119204 A119205 A119206

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, May 10 2006

STATUS

approved