A119058 Numbers k such that the k-th triangular number contains only digits {0,2,9}.

44, 64656155, 429439844, 632914215, 21072266180

Offset

1,1

Comments

Next term must be greater than 1.4*10^20. - Max Alekseyev, Aug 14 2013

Links

Table of n, a(n) for n=1..5.

G. Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A119057. See A119034 for a table of cross-references.

Sequence in context: A172878 A001782 A172910 * A218402 A131994 A037940

Adjacent sequences: A119055 A119056 A119057 * A119059 A119060 A119061

Keyword

nonn,base,more

Author

Giovanni Resta, May 10 2006

Status

approved