A048424 Numbers k such that the decimal expansion of k^2 consists of two squares that overlap in 2 digits.

487, 721, 42375, 110125, 198275, 1249827, 2672125, 3668325, 4205925, 4689974, 7446484, 16999709, 18700025, 59300075, 66534325, 84998545, 139372012, 148421502, 291256461, 590939886, 720025325, 781462056, 976100002, 998014875

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