A053905 Squares composed of digits {1,5,8}.

1, 81, 11881, 88118818815155881, 18851515118581858155155881, 11555185818155188818511188881585888881, 5818888111118115811551585855811558551185881

Offset

1,2

Links

Table of n, a(n) for n=1..7.

Patrick De Geest, Squares containing at most three distinct digits, Index entries for related sequences.

Hisanori Mishima Squares consisted of 3 different digits.

Formula

a(n) = A053904(n)^2. - Elmo R. Oliveira, Jul 18 2025

Crossrefs

Cf. A053904.

Sequence in context: A058422 A053913 A053895 * A184690 A143005 A187432

Adjacent sequences: A053902 A053903 A053904 * A053906 A053907 A053908

Keyword

nonn,base,more

Author

Patrick De Geest, Mar 15 2000

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

Status

approved