|
%I #10 Jul 20 2021 23:43:29
%S 8,98,590,738,830,998,1080,4508,9998,20660,29754,99998,980300,999998,
%T 6694218,9999998,49826988,99999998,117738578,131505858,132231404,
%U 176445054,177285320,247979808,252028388,335180054,336337790
%N Numbers k such that k concatenated with k-4 gives the product of two numbers which differ by 5.
%C Also numbers k such that k concatenated with itself gives the product of two numbers which differ by 3.
%e 7531357568//7531357564 = 8678339452 * 8678339457, where // denotes concatenation.
%Y Cf. A116124, A116129, A116131, A116099, A116261, A116163, A116136, A116125, A116287.
%K nonn,base
%O 1,1
%A _Giovanni Resta_, Feb 06 2006
%E Edited by _N. J. A. Sloane_, Apr 13 2007
|
