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 A177319 #12 May 16 2020 12:38:54 %S A177319 1,2,148,41618,16699380,8039989002,4339892975512,2535604038015218, %T A177319 1570273521448103668,1016915629343040544250,682308706348352869913148, %U A177319 471167961102713571612302730,333217453890900855796193690520,240438319207137787818120695999370 %N A177319 Number of permutations of n copies of 1..7 with all adjacent differences <= 1 in absolute value. %H A177319 Andrew Howroyd, <a href="/A177319/b177319.txt">Table of n, a(n) for n = 0..100</a> %Y A177319 Row n=7 of A331562. %K A177319 nonn %O A177319 0,2 %A A177319 _R. H. Hardin_, May 06 2010 %E A177319 a(0)=1 prepended by _Alois P. Heinz_, Jan 20 2020 %E A177319 Terms a(8) and beyond from _Andrew Howroyd_, May 16 2020