A119163 Numbers k such that the k-th triangular number contains only digits {2,4,8}.

7, 312, 1287, 1297912, 7054712, 7521287, 2384302087

Offset

1,1

Comments

Next term exceeds 1.4*10^20. - Max Alekseyev, May 18 2025

Links

Table of n, a(n) for n=1..7.

Giovanni Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A119162. See A119034 for a table of cross-references.

Sequence in context: A300870 A239163 A086215 * A364479 A171148 A219267

Adjacent sequences: A119160 A119161 A119162 * A119164 A119165 A119166

Keyword

nonn,base,more

Author

Giovanni Resta, May 10 2006

Status

approved