A058420 Squares composed of digits {0,1,7}, not ending with zero.

1, 770007001, 71017701771000177071770101111001

Offset

1,2

Links

Table of n, a(n) for n=1..3.

P. De Geest, Index to related sequences

Hisanori Mishima, Sporadic tridigital solutions

Crossrefs

Cf. A058419.

Sequence in context: A306569 A118876 A157788 * A297867 A344729 A344730

Adjacent sequences: A058417 A058418 A058419 * A058421 A058422 A058423

Keyword

nonn,base,hard,more,bref

Author

Patrick De Geest, Nov 15 2000

Status

approved