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A053947 Squares composed of digits {3,6,7}. 2
36, 676, 37636, 767376, 337677376, 636367377337637773373677663667776, 3736363367333373666777367633763676676 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 24 22:31 EDT 2017. Contains 292441 sequences.