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Numbers k such that k concatenated with k-8 gives the product of two numbers which differ by 2.
5

%I #6 Jul 21 2021 22:46:11

%S 16,1337032,2084503,2953232,4023943,1330033613070195328,

%T 4036108433661798551,8283744867954114232,

%U 6247320195351414276186411625291,9452080202814205132771066881607

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

%e 4023943//4023935 = 6343455 * 6343457, where // denotes

%e concatenation.

%Y Cf. A116095, A116101, A116103, A116116, A116233.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006