A053907 Squares composed of digits {1,6,7}.
1, 16, 676, 17161, 76176, 776161, 11771761, 6617171716, 6661661161, 16671716161, 17676766116, 1671671667166667776
Offset: 1
Links
- Patrick De Geest, Squares containing at most three distinct digits, Index entries for related sequences.
- Hisanori Mishima, Sporadic tridigital solutions.
Crossrefs
Cf. A053906.
Formula
a(n) = A053906(n)^2. - Elmo R. Oliveira, Jul 17 2025
Extensions
More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005