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%I #10 May 07 2018 07:03:15
%S 1,2,3,4,5,6,27,81,133,143,144,152,190,209,250,1125,8569,10934,16401,
%T 237568,362306,391257,695751,723260,5294625,6056974,6332291,6523631,
%U 6669475,11128547,12486285,17417491,18682225,19429514,19781014,20924092,21671381
%N Numbers equal to the determinant of a circulant matrix based on the base-7 digits of n.
%C Base 7 variant of A219327. See A303366 .. A303369 for other bases.
%e 133 is in the sequence because 133 = 250[7] (in base 7) and 133 = det [2,5,0; 0,2,5; 5,0,2].
%o (PARI) (c(v)=abs(matdet(matrix(#v,#v,i,j,v[(j-i)%#v+1]))));for(n=1,oo,n==c(digits(n,7))&&print1(n","))
%Y Cf. A303366 (base 6), A303368 (base 8), A303369 (base 9), A219327 (base 10).
%K nonn,base
%O 1,2
%A _M. F. Hasler_, May 05 2018
%E a(25)-a(37) from _Giovanni Resta_, May 07 2018
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