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 A383079 #10 Apr 18 2025 13:36:14 %S A383079 9,9,22,48,109,244,549,1233,2771,6226,13990,31435,70634,158713,356625, %T A383079 801329,1800570,4045844,9090929,20427132,45899349,103134901,231742019, %U A383079 520719590,1170046298,2629070167,5907467042,13273957953,29826312781,67019116473,150590587774 %N A383079 Number of n-digit positive integers where all pairs of consecutive digits have a difference of at least 7. %H A383079 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (2,1,-1). %F A383079 G.f.: x*(4*x^3-5*x^2-9*x+9)/(x^3-x^2-2*x+1). - _Alois P. Heinz_, Apr 15 2025 %Y A383079 Cf. A052268, A100062, A383070, A383071, A383072, A383077, A383078. %K A383079 nonn,easy %O A383079 1,1 %A A383079 _Edwin Hermann_, Apr 15 2025 %E A383079 More terms from _Alois P. Heinz_, Apr 15 2025