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A303367 Numbers equal to the determinant of a circulant matrix based on the base-7 digits of n. 4
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

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

LINKS

Table of n, a(n) for n=1..37.

EXAMPLE

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

PROG

(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", "))

CROSSREFS

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

Sequence in context: A037440 A262434 A246908 * A037332 A091690 A024640

Adjacent sequences:  A303364 A303365 A303366 * A303368 A303369 A303370

KEYWORD

nonn,base

AUTHOR

M. F. Hasler, May 05 2018

EXTENSIONS

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

STATUS

approved

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Last modified January 15 09:23 EST 2021. Contains 340187 sequences. (Running on oeis4.)