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 A116133 #8 Jul 20 2021 23:43:53 %S A116133 64,1876,3214,8776,17227120144584448354,19391087990479091186, %T A116133 21557280540171744040,23970390649400564404,26051259424903756364, %U A116133 28697643366269876506,31320461807899711990,34215988012600009664 %N A116133 Numbers k such that k concatenated with k-4 gives the product of two numbers which differ by 9. %C A116133 Also numbers k such that k concatenated with k+4 gives the product of two numbers which differ by 7. %C A116133 Since k*(10^j+1) + 4 = m*(m+7) iff k*(10^j+1) - 4 = m*(m+7) - 8 = (m-1)*(m+8) = M*(M+9) this is trivially the same sequence. - _N. J. A. Sloane_, Apr 11 2007 %e A116133 8776//8772 = 9364 * 9373, where // denotes concatenation. Also 8776//8780 = 9365 * 9372. %Y A116133 Cf. A116132, A116140, A116264. %Y A116133 Cf. A116180, A116187, A116189, A116195, A116319. %K A116133 nonn,base %O A116133 1,1 %A A116133 _Giovanni Resta_, Feb 06 2006 %E A116133 Edited by _N. J. A. Sloane_, Apr 11 2007