The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A136906 Numbers k such that k and k^2 use only the digits 0, 2, 4, 7 and 8. 1
 0, 2, 20, 22, 28, 88, 200, 202, 220, 278, 280, 448, 472, 478, 878, 880, 2000, 2002, 2020, 2022, 2200, 2202, 2780, 2800, 2878, 4480, 4720, 4780, 8780, 8800, 20000, 20002, 20020, 20022, 20200, 20220, 22000, 22002, 22020, 27800, 28000, 28780, 44800, 47200, 47202, 47800, 84878, 87800, 88000, 88022, 200000, 200002, 200020, 200022, 200200, 200202 (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..1210 J. Wellons, Tables of Shared Digits EXAMPLE 4782702420472^2 = 22874242442788727484702784. MATHEMATICA With[{c={0, 2, 4, 7, 8}}, Select[FromDigits/@Tuples[c, 6], SubsetQ[c, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Jan 22 2023 *) CROSSREFS Sequence in context: A235500 A319953 A111193 * A260570 A022372 A322964 Adjacent sequences: A136903 A136904 A136905 * A136907 A136908 A136909 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified February 24 22:04 EST 2024. Contains 370307 sequences. (Running on oeis4.)