A053962 Numbers k such that k^2 contains only digits {4,7,8}.

2, 22, 28, 88, 86478, 94227622, 9208064263934568938, 22019193553462506122, 6984617991328143315228383028

Offset

1,1

Links

Table of n, a(n) for n=1..9.

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

H. Mishima Squares consisted of 3 different digits [From Max Alekseyev, Mar 10 2009]

Crossrefs

Cf. A053963.

Sequence in context: A368406 A137074 A137106 * A111771 A052001 A275029

Adjacent sequences: A053959 A053960 A053961 * A053963 A053964 A053965

Keyword

nonn,base,more

Author

Patrick De Geest, Mar 15 2000

Extensions

Two more terms from Mishima's page added by Max Alekseyev, Mar 10 2009

a(9) from Zhao Hui Du, Mar 09 2024

Status

approved