Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #12 May 16 2020 12:38:54
%S 1,2,148,41618,16699380,8039989002,4339892975512,2535604038015218,
%T 1570273521448103668,1016915629343040544250,682308706348352869913148,
%U 471167961102713571612302730,333217453890900855796193690520,240438319207137787818120695999370
%N Number of permutations of n copies of 1..7 with all adjacent differences <= 1 in absolute value.
%H Andrew Howroyd, <a href="/A177319/b177319.txt">Table of n, a(n) for n = 0..100</a>
%Y Row n=7 of A331562.
%K nonn
%O 0,2
%A _R. H. Hardin_, May 06 2010
%E a(0)=1 prepended by _Alois P. Heinz_, Jan 20 2020
%E Terms a(8) and beyond from _Andrew Howroyd_, May 16 2020