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%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
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