A053901 Squares composed of digits {1,4,8}.

1, 4, 81, 144, 441, 484, 841, 1444, 11881, 14884, 48841, 1418481, 414488881, 144418888188481, 4141181448448144, 4811118811848441, 11181184881818884, 1814448814844418841, 114811414848448481881, 441148818414884144184841, 884188888841188881111184, 18181411818114841118484484

Offset: 1

Author

Patrick De Geest, Mar 15 2000

Keywords

• nonn
• base

Links

• Zhao Hui Du, Table of n, a(n) for n = 1..31
• Author?, Source(txt)
• Patrick De Geest, Squares containing at most three distinct digits, Index entries for related sequences.
• Hisanori Mishima, Sporadic tridigital solutions.

Crossrefs

Cf. A053900.

Formula

a(n) = A053900(n)^2. - Elmo R. Oliveira, Jul 16 2025

Extensions

More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005