%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