This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A116193 #8 Jul 19 2021 22:37:03 %S A116193 11,45,18281,32769,56891,180689,330539,959481,1850201,3247409,4940219, %T A116193 2425563239,2575561739,6003563495,7245212645,7770160145,4983798265289, %U A116193 5049762270381,5534298528989,5603798594169,21894082450101 %N A116193 Numbers k such that k concatenated with k+5 gives the product of two numbers which differ by 5. %C A116193 Also numbers k such that k concatenated with k+9 gives the product of two numbers which differ by 3. For proof that this is the same sequence compare A116133. %C A116193 Also numbers k such that k concatenated with k-9 gives the product of two numbers which differ by 9. %e A116193 7770160145//7770160136 = 8814851183 * 8814851192, where // denotes concatenation. %Y A116193 Cf. A116205, A116187, A116349. %Y A116193 Cf. A116179, A115430, A116194, A116200, A116324. %Y A116193 Cf. A116099, A116109, A116231. %K A116193 nonn,base %O A116193 1,1 %A A116193 _Giovanni Resta_, Feb 06 2006 %E A116193 Edited by _N. J. A. Sloane_, Apr 12 2007