A053947 Squares composed of digits {3,6,7}.

36, 676, 37636, 767376, 337677376, 636367377337637773373677663667776, 3736363367333373666777367633763676676

Offset

1,1

Links

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

P. De Geest, Squares containing at most three distinct digits, Index entries for related sequences

H. Mishima, Sporadic tridigital solutions

Formula

a(n) = A053946(n)^2.

Crossrefs

Cf. A053946.

Sequence in context: A271794 A182678 A239181 * A157092 A004419 A268900

Adjacent sequences: A053944 A053945 A053946 * A053948 A053949 A053950

Keyword

nonn,base,more

Author

Patrick De Geest, Mar 15 2000

Extensions

Two more terms from Mishima's webpage added by Max Alekseyev, Jan 28 2012

Status

approved