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

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A137006 Numbers k such that k and k^2 use only the digits 1, 2, 5, 6 and 9. 2
 1, 5, 11, 15, 16, 25, 96, 125, 161, 511, 515, 516, 1119, 1125, 1515, 1619, 2261, 5125, 9619, 9961, 12296, 12511, 12515, 16215, 16296, 22619, 22925, 25525, 25596, 51211, 96211, 112515, 125125, 126211, 126969, 129215, 161125, 161219, 226961, 256169, 262925, 511969, 516296, 956619, 959961, 1119219, 1121125, 1126925, 1252965, 1261965, 1262125 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Generated with DrScheme. LINKS Jonathan Wellons, Table of n, a(n) for n = 1..420 J. Wellons, Tables of Shared Digits EXAMPLE 126961261519525^2 = 16119161926629219511956225625. MATHEMATICA With[{c={1, 2, 5, 6, 9}}, Flatten[Table[FromDigits/@Select[ Tuples[c, n], SubsetQ[ c, IntegerDigits[FromDigits[#]^2]]&], {n, 7}]]] (* Harvey P. Dale, Nov 25 2014 *) CROSSREFS Sequence in context: A314002 A137004 A137005 * A137003 A314003 A314004 Adjacent sequences:  A137003 A137004 A137005 * A137007 A137008 A137009 KEYWORD base,nonn AUTHOR Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008 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 December 1 16:44 EST 2021. Contains 349430 sequences. (Running on oeis4.)