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%I #6 Jul 20 2021 23:47:44
%S 1,3,81,1353,3997,7723,23761,26271,76771,1415683,3890571,8495497,
%T 1066870443,1239366513,4198438981,4534273891,6502317141,6918679731,
%U 2199164200036329043,2820114781174460091,5500888421709400741
%N Numbers k such that k concatenated with k+3 gives the product of two numbers which differ by 5.
%Y Cf. A116172, A116112, A116180, A116193, A116310.
%K nonn,base
%O 1,2
%A _Giovanni Resta_, Feb 06 2006
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