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Numbers k such that k^2 is the concatenation of two numbers m and m+2.
11

%I #5 Jul 15 2021 06:17:49

%S 8874,9011,83352842,99000101,329767122288,670232877713,738226276373,

%T 933006600341,999000001001,3779410975143115,3872816717528067,

%U 4250291784692550,4278630943941867,4372036686326819,4749511753491302

%N Numbers k such that k^2 is the concatenation of two numbers m and m+2.

%e 9011^2 = 8119_8121.

%Y Cf. A030467, A106497, A115426, A115438, A115439, A115440, A115441, A115442, A115443, A115444, A115445, A115446, A115447.

%K base,nonn

%O 1,1

%A _Giovanni Resta_, Jan 24 2006