A119084 Numbers k such that the k-th triangular number contains only digits {0,5,8}.

10, 100, 1000, 10000, 100000, 1000000, 1056485, 10000000, 40212075, 100000000, 1000000000, 10000000000, 100000000000, 100549051600, 1000000000000, 10000000000000, 100000000000000, 421438146839024, 1000000000000000

Offset

1,1

Links

Table of n, a(n) for n=1..19.

G. Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A119083. See A119034 for a table of cross-references.

Sequence in context: A136844 A136842 A136872 * A136875 A135654 A219112

Adjacent sequences: A119081 A119082 A119083 * A119085 A119086 A119087

Keyword

nonn,base

Author

Giovanni Resta, May 10 2006

Status

approved