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 A067407 #12 Sep 30 2022 14:37:41 %S A067407 1,13,637,31213,1529437,74942413,3672178237,179936733613, %T A067407 8816899947037,432028097404813,21169376772835837,1037299461868956013, %U A067407 50827673631578844637,2490556007947363387213,122037244389420805973437,5979824975081619492698413,293011423778999355142222237 %N A067407 Seventh column of triangle A067402. %H A067407 <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (49). %F A067407 a(n) = A067402(n+6, 6). %F A067407 a(n) = 13*49^(n-1), n>=1, a(0) = 1. %F A067407 G.f.: (1-36*x)/(1-49*x). %F A067407 E.g.f.: (36 + 13*exp(49*x))/49. - _Stefano Spezia_, Sep 30 2022 %Y A067407 Cf. A067406 (sixth column), A067408 (eighth column). %Y A067407 Cf. A067402. %K A067407 nonn,easy %O A067407 0,2 %A A067407 _Wolfdieter Lang_, Jan 25 2002