OFFSET
2,1
COMMENTS
These determinants are always nonzero, as shown by Beslin and Ligh.
LINKS
Scott Beslin and Steven Ligh, Greatest Common Divisor Matrices, Linear Algebra and Its Applications 119 (1989), 69-76.
MATHEMATICA
Table[Det[Table[GCD[i, j], {i, 2, n}, {j, 2, n}]], {n, 2, 25}]
PROG
(PARI) a(n)={matdet(matrix(n-1, n-1, i, j, gcd(i+1, j+1)))} \\ Andrew Howroyd, Jan 07 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
Matt Frank, Jan 04 2020
STATUS
approved