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%I #20 Oct 18 2021 15:19:28
%S 1,2,3,4,5,6,7,8,9,48,247,370,378,407,481,518,592,629,1547,26027,
%T 26933,45018,69781,80487,123823,289835,1920261,2137616,2716713,
%U 3100883,3480140,3934896,4179451,4830936,5218958,23203827
%N Positive integers m that are equal to the determinant of the circulant matrix formed by the decimal digits of m in reverse order.
%C Terms with odd number of digits are the same as in A219324.
%H Max Alekseyev, <a href="/A219326/b219326.txt">Table of n, a(n) for n = 1..53</a> (complete up to 10^10)
%e | 7 4 5 1 |
%e 1547 = det | 1 7 4 5 |
%e | 5 1 7 4 |
%e | 4 5 1 7 |
%o (Python)
%o from sympy import Matrix
%o A219326_list = []
%o for n in range(1,10**6):
%o s = [int(d) for d in str(n)][::-1]
%o m = len(s)
%o if n == Matrix(m, m, lambda i, j: s[(i-j) % m]).det():
%o A219326_list.append(n) # _Chai Wah Wu_, Oct 18 2021
%Y A219324 is the main entry for this sequence, provides references and further details.
%K base,nonn
%O 1,2
%A _Max Alekseyev_, Nov 17 2012
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