This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A374386 #11 Jul 10 2024 13:43:03 %S A374386 1,0,-4,24,-324,-15164,-1453072,-161765904,-37905894000, %T A374386 -1376219654680,-718058901423168,-163742479201610036 %N A374386 a(n) is the minimal determinant of an n X n symmetric Toeplitz matrix having 0 on the main diagonal and all the first n-1 primes off-diagonal. %H A374386 Wikipedia, <a href="https://en.wikipedia.org/wiki/Toeplitz_matrix">Toeplitz Matrix</a>. %e A374386 a(5) = -15164: %e A374386 [0, 2, 7, 3, 5] %e A374386 [2, 0, 2, 7, 3] %e A374386 [7, 2, 0, 2, 7] %e A374386 [3, 7, 2, 0, 2] %e A374386 [5, 3, 7, 2, 0] %t A374386 a[n_]:=Min[Table[Det[ToeplitzMatrix[Join[{0},Part[Permutations[Prime[Range[n-1]]],i]]]],{i,(n-1)!}]]; Join[{1},Array[a,10]] %Y A374386 Cf. A071079, A374340. %Y A374386 Cf. A374387 (maximal), A374388 (maximal absolute value), A374389 (minimal nonzero absolute value). %Y A374386 Cf. A374068 (minimal permanent), A374390 (maximal permanent). %K A374386 sign,hard,more %O A374386 0,3 %A A374386 _Stefano Spezia_, Jul 07 2024 %E A374386 a(11) from _Giorgos Kalogeropoulos_, Jul 10 2024