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A053961 Squares composed of digits {4,6,9}. 2
4, 9, 49, 64, 44944, 69696, 4999696, 9696996, 9966649, 999444996, 4649466969, 64944444964, 6469646694964996, 69446644696999969, 9446966946446994496, 44499464666496696649, 446646664496496964644, 466994666666446696996, 494494499966694999949669969 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..19.

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

Author?, Source (txt)

Hisanori Mishima, Sporadic tridigital solutions

FORMULA

a(n) = A053960(n)^2.

MATHEMATICA

fQ[n_] := Union[ Join[{4, 6, 9}, IntegerDigits[n]]] == {4, 6, 9}; lst = {}; Do[ If[ fQ[n^2], AppendTo[lst, n^2]], {n, 2*10^9}]; lst (* Robert G. Wilson v, Jun 01 2005 *)

CROSSREFS

Cf. A053960, A107665, A107666.

Sequence in context: A115687 A115711 A029791 * A055812 A268099 A061867

Adjacent sequences:  A053958 A053959 A053960 * A053962 A053963 A053964

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Mar 15 2000

EXTENSIONS

More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 03 2005

STATUS

approved

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Last modified March 31 19:37 EDT 2020. Contains 333151 sequences. (Running on oeis4.)