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A048424 Numbers k such that the decimal expansion of k^2 consists of two squares that overlap in 2 digits. 1
487, 721, 42375, 110125, 198275, 1249827, 2672125, 3668325, 4205925, 4689974, 7446484, 16999709, 18700025, 59300075, 66534325, 84998545, 139372012, 148421502, 291256461, 590939886, 720025325, 781462056, 976100002, 998014875 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Subsquares with leading and/or trailing zeros not included. Subsquares at least 3 digits long.

LINKS

Table of n, a(n) for n=1..24.

EXAMPLE

k=721 is a term:

  721^2 = 519841

  228^2 = 51984

   29^2 =    841

             ^^

             ||

       2-digit overlap

CROSSREFS

Cf. A000290, A048423.

Sequence in context: A178812 A124667 A142540 * A142858 A255207 A236424

Adjacent sequences:  A048421 A048422 A048423 * A048425 A048426 A048427

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Apr 15 1999

EXTENSIONS

a(14)-a(24) from Lars Blomberg, May 05 2011

STATUS

approved

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Last modified August 7 10:19 EDT 2022. Contains 355985 sequences. (Running on oeis4.)