A218389 Numbers k such that the k-th triangular number contains only digits {0,2,4}.

8944, 2209995667055, 6957333458215, 20001000974971249775

Offset

1,1

Comments

No other terms below 1.4*10^20.

Links

Table of n, a(n) for n=1..4.

G. Resta, Tridigital Triangular Numbers

Crossrefs

Cf. A000217, A218390. See A119034 for a table of cross-references.

Sequence in context: A259631 A251921 A217604 * A180298 A322537 A172637

Adjacent sequences: A218386 A218387 A218388 * A218390 A218391 A218392

Keyword

base,nonn,more

Author

Max Alekseyev, Oct 27 2012

Status

approved