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A136894
Numbers k such that k and k^2 use only the digits 0, 2, 3, 6 and 9.
1
0, 3, 6, 30, 60, 63, 300, 306, 600, 603, 630, 3000, 3006, 3060, 6000, 6003, 6030, 6300, 26323, 30000, 30006, 30060, 30600, 60000, 60003, 60030, 60300, 63000, 263230, 263323, 300000, 300006, 300060, 300600, 306000, 600000, 600003, 600030, 600300, 603000, 630000, 2632300, 2633230, 3000000, 3000006, 3000060, 3000600, 3006000, 3060000, 6000000
OFFSET
1,2
COMMENTS
Generated with DrScheme.
LINKS
J. Wellons, Tables of Shared Digits [archived]
EXAMPLE
962309393939236^2 = 926039369663699699969660263696.
MATHEMATICA
With[{c={0, 2, 3, 6, 9}}, Select[FromDigits/@Tuples[c, 7], SubsetQ[c, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Nov 22 2019 *)
CROSSREFS
Sequence in context: A136932 A136945 A260906 * A136939 A136944 A136946
KEYWORD
base,nonn
AUTHOR
Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
STATUS
approved