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 A383201 #14 May 02 2025 17:13:08 %S A383201 9,81,724,6472,57851,517112,4622299,41317257,369321783,3301249634, %T A383201 29508817638,263769909867,2357755102376,21075220921085, %U A383201 188384678470177,1683910560899833,15051939468415328,134544486519385896,1202650255852445247,10750107085908359068 %N A383201 Number of positive integers with n digits in which adjacent digits differ by at most 6. %H A383201 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (8,9,-5,-4). %F A383201 G.f.: -x*(4*x^3+5*x^2-9*x-9)/(4*x^4+5*x^3-9*x^2-8*x+1). - _Alois P. Heinz_, Apr 26 2025 %Y A383201 Cf. A235163, A383197, A383198, A383199, A383200, A383202. %K A383201 nonn,base,easy %O A383201 1,1 %A A383201 _Edwin Hermann_, Apr 19 2025 %E A383201 a(11)-a(20) from _Alois P. Heinz_, Apr 26 2025