A137147 - OEIS

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A137147

Numbers k such that k and k^2 use only the digits 5, 6, 7, 8 and 9.

12

76, 87, 766, 887, 7666, 8887, 9786, 76587, 76666, 87576, 759576, 766666, 869866, 869867, 886886, 888587, 988866, 7666666, 8766867, 8885887, 76587576, 76666666, 76789686, 86998666, 87565786, 87685676, 88766867, 97759786, 97957576, 766666666, 875765766, 886885887, 887579686, 977699687

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Generated with DrScheme.

LINKS

Jonathan Wellons, Table of n, a(n) for n = 1..183

J. Wellons, Tables of Shared Digits [archived]

OEIS Index to sequences related to squares.

EXAMPLE

989878759589576^2 = 979859958686597599779967859776.

CROSSREFS

Cf. A136808, A136809, ..., A137146 for other digit combinations.

Cf. A000290 (the squares); A027675, A058411, ..., A058474 (3-digit combinations).

Cf. A277959, A277960, A277961, A295005, ..., A295009 (squares with largest digit = 2, 3, 4, 5, ..., 9).

Sequence in context: A095573 A095559 A095545 * A341178 A114914 A026046

Adjacent sequences: A137144 A137145 A137146 * A137148 A137149 A137150

KEYWORD

base,nonn

AUTHOR

Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008

STATUS

approved