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%I #6 Feb 18 2022 20:25:34
%S 1,1,1,1,1,1,1,2,3,1,1,2,5,3,1,1,3,13,18,7,1,1,3,20,50,43,9,1,1,4,36,
%T 136,221,126,19,1,1,4,52,296,773,866,339,29,1,1,5,78,596,2303,4281,
%U 3437,946,55,1,1,5,105,1080,5817,16317,22430,13250,2591,93,1
%N Triangle of coefficients of polynomials arising in enumeration of periodic sequences.
%D E. N. Gilbert and J. Riordan, Symmetry types of periodic sequences, Illinois J. Math., 5 (1961), 657-665.
%H Sean A. Irvine, <a href="https://github.com/archmageirvine/joeis/blob/master/src/irvine/oeis/a054/A054722.java">Java program</a> (github)
%e 1; 1,1; 1,1,1; 1,2,3,1; ...
%K nonn,tabl
%O 1,8
%A _N. J. A. Sloane_, Apr 20 2000
%E More terms and offset corrected by _Sean A. Irvine_, Feb 18 2022
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