%I #8 Jul 20 2021 23:47:25

%S 1143,4382,4943,24941511,25058558,94090583,616729341438,638432642423,

%T 978717194478,994009005983,1636200161363007,1710661666314798,

%U 1805005185949007,1906479843038783,1986790648039982,3072104679280383

%N Numbers k such that k concatenated with k+2 gives the product of two numbers which differ by 8.

%C Also numbers k such that k concatenated with k+9 gives the product of two numbers which differ by 6.

%e 94090583//94090585 = 97000297 * 97000305, where // denotes concatenation.

%e 94090583//94090592 = 97000298 * 97000304.

%Y Cf. A116168, A116173, A116175, A116181, A116305.

%Y Cf. A116180, A116169, A116352.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006

%E Edited by _N. J. A. Sloane_, Apr 13 2007