The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #7 Apr 27 2021 21:06:55
%S 1,20,264,2904,9968,257136,3160800,37000368
%N Number of arrays of length n that are sums of 4 consecutive elements of length n+3 permutations of 0..n+2.
%C Column 4 of A229565.
%e Some solutions for n=3:
%e 10 12 7 9 11 10 6 9 8 8 11 10 10 12 7 9
%e 14 9 12 10 7 14 7 12 12 11 14 8 9 9 8 8
%e 13 10 13 11 10 11 11 10 11 10 13 6 7 11 11 7
%Y Cf. A229565.
%K nonn
%O 1,2
%A _R. H. Hardin_, Sep 26 2013