A058442 Squares composed of digits {0,4,8}, not ending with zero.

4, 484, 40804, 88804, 4008004, 4088484, 4848804, 400080004, 400880484, 484088004, 840884004, 40000800004, 40008800484, 40080840804, 40804808004, 48400880004, 400084080484, 4000008000004, 4000088000484, 4000808040804, 4080408080004, 4080488880484, 4840008800004

Offset

1,1

Links

Zhao Hui Du, Table of n, a(n) for n = 1..4000

Patrick De Geest, Index to related sequences.

Hisanori Mishima, Sporadic tridigital solutions.

Formula

a(n) = A058441(n)^2. - Elmo R. Oliveira, Jul 16 2025

Mathematica

Select[FromDigits/@Tuples[{0, 4, 8}, 13], Mod[#, 10]!=0&&IntegerQ[Sqrt[#]]&] (* Harvey P. Dale, Feb 14 2023 *)

Crossrefs

Cf. A058441.

Sequence in context: A053963 A053941 A027678 * A221242 A075411 A114763

Adjacent sequences: A058439 A058440 A058441 * A058443 A058444 A058445

Keyword

nonn,base

Author

Patrick De Geest, Nov 15 2000

Status

approved