A303367 Numbers equal to the determinant of a circulant matrix based on the base-7 digits of n.

1, 2, 3, 4, 5, 6, 27, 81, 133, 143, 144, 152, 190, 209, 250, 1125, 8569, 10934, 16401, 237568, 362306, 391257, 695751, 723260, 5294625, 6056974, 6332291, 6523631, 6669475, 11128547, 12486285, 17417491, 18682225, 19429514, 19781014, 20924092, 21671381

Offset: 1

Author

M. F. Hasler, May 05 2018

Keywords

• nonn
• base

Comments

Base 7 variant of A219327. See A303366 .. A303369 for other bases.

Examples

			133 is in the sequence because 133 = 250[7] (in base 7) and 133 = det [2,5,0; 0,2,5; 5,0,2].
		

Crossrefs

Cf. A303366 (base 6), A303368 (base 8), A303369 (base 9), A219327 (base 10).

Programs

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","))

Extensions

a(25)-a(37) from Giovanni Resta, May 07 2018