The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 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 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

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