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A115427
Numbers k such that k^2 is the concatenation of two numbers m and m+2.
11
8874, 9011, 83352842, 99000101, 329767122288, 670232877713, 738226276373, 933006600341, 999000001001, 3779410975143115, 3872816717528067, 4250291784692550, 4278630943941867, 4372036686326819, 4749511753491302
OFFSET
1,1
EXAMPLE
9011^2 = 8119_8121.
KEYWORD
base,nonn
AUTHOR
Giovanni Resta, Jan 24 2006
STATUS
approved