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%I #6 Jul 20 2021 23:43:37
%S 20,31,14564,38239,69919,120395,426436,902596,7478020,9090220,
%T 6671332084,8114264059,8482227259,9900250996,2244338786836,
%U 2490577152964,2509440638591,2769448208395,7012067592220
%N Numbers k such that k concatenated with k-4 gives the product of two numbers which differ by 6.
%e 9900250996//9900250992 = 9950000498 * 9950000504, where // denotes concatenation.
%Y Cf. A116125, A116130, A116132, A115429, A116262.
%K nonn,base
%O 1,1
%A _Giovanni Resta_, Feb 06 2006
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