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

A116161

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

Terms

    a(0) =3a(1) =93a(2) =145a(3) =384a(4) =505a(5) =820a(6) =993a(7) =7680a(8) =9993a(9) =20665a(10) =29748a(11) =99993a(12) =480340a(13) =999993a(14) =6694209a(15) =9999993a(16) =77854665a(17) =99999993a(18) =107541513a(19) =109342209a(20) =132231408a(21) =174990384a(22) =183673473a(23) =213017748a(24) =289940833a(25) =326530608a(26) =338353345

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