A053905 Squares composed of digits {1,5,8}.
1, 81, 11881, 88118818815155881, 18851515118581858155155881, 11555185818155188818511188881585888881, 5818888111118115811551585855811558551185881
Offset: 1
Links
- Patrick De Geest, Squares containing at most three distinct digits, Index entries for related sequences.
- Hisanori Mishima Squares consisted of 3 different digits.
Crossrefs
Cf. A053904.
Formula
a(n) = A053904(n)^2. - Elmo R. Oliveira, Jul 18 2025
Extensions
a(5) from Jon E. Schoenfield, Sep 03 2006
a(6)-a(7) from Mishima's webpage added by Max Alekseyev, May 21 2009