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 A369832 #11 Feb 11 2024 11:21:10 %S A369832 1,1,2,6,24,116,717,5033,40301,362845 %N A369832 a(n) is the number of distinct values of the determinant of an n X n symmetric Toeplitz matrix using the first n prime numbers. %H A369832 Wikipedia, <a href="http://en.wikipedia.org/wiki/Toeplitz_matrix">Toeplitz Matrix</a>. %F A369832 a(n) <= A000142(n). %t A369832 a[n_] := CountDistinct[Table[Det[ToeplitzMatrix[Part[Permutations[Prime[Range[n]]], i]]], {i, n !}]]; Join[{1}, Array[a,9]] %o A369832 (Python) %o A369832 from itertools import permutations %o A369832 from sympy import primerange, prime, Matrix %o A369832 def A369832(n): return len({Matrix([p[i:0:-1]+p[:n-i] for i in range(n)]).det() for p in permutations(primerange(prime(n)+1))}) if n else 1 # _Chai Wah Wu_, Feb 11 2024 %Y A369832 Cf. A000142, A348891, A350955, A350956. %Y A369832 Cf. A369830, A369831, A369833, A369834, A369835. %K A369832 nonn,hard,more %O A369832 0,3 %A A369832 _Stefano Spezia_, Feb 03 2024