A086459 -id:A086459 - cp's OEIS frontend

A118702 a(n) = determinant of n X n circulant matrix whose first row is the first n Lucas numbers A000032, from L(0) to L(n-1).

2, 3, 18, 0, 8347, -861952, 391524998, -359089453125, 893329160995712, -5499366235206395112, 87687141416511254851323, -3590079701896396800000000000, 381284797406693371431803926245802, -105147887074796935457211770823970013737

Offset: 1

Jonathan Vos Post, May 20 2006

			a(4) = 0 because of the singular matrix:
[2, 1, 3, 4]
[4, 2, 1, 3]
[3, 4, 2, 1]
[1, 3, 4, 2].

Eric Weisstein's World of Mathematics, Circulant Matrix.

A000032 Lucas numbers (beginning at 2): L(n) = L(n-1) + L(n-2). A048954 Wendt determinant of n-th circulant matrix C(n). A052182 Circulant of natural numbers. A066933 Circulant of prime numbers. A086459 Circulant of powers of 2.

Cf. A000032, A048954, A052182, A066933, A086459, A086569.

circ[w_] := NestList[RotateRight, w, Length[w] - 1]; Table[ Det[ circ[ LucasL@ Range[0, n - 1]]], {n, 10}] (* Giovanni Resta, Jun 16 2016 *)

Corrected and extended by Giovanni Resta, Jun 16 2016

cp's OEIS Frontend

A118702 a(n) = determinant of n X n circulant matrix whose first row is the first n Lucas numbers A000032, from L(0) to L(n-1).

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