A053883 Squares composed of digits {1,2,6}.
1, 16, 121, 2116, 261121, 2621161, 6222212161, 6626611216, 6661661161, 26166621121, 1221126662116, 2121112611216, 21122122166161, 662612612216121616, 16611262122666122666161, 12626261111222162126111612161, 2221262216626122626662262611111116211216, 2662116111222626216162621266666216222222216621166116
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. A053882.
Formula
a(n) = A053882(n)^2. - Elmo R. Oliveira, Jul 18 2025
Extensions
More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005
a(18) from Zhao Hui Du, Feb 28 2024