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proposed
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R. L. Graham and D. H. Lehmer, , <a href="https://doi.org/10.1017/S1446788700019339">On the Permanent of Schur's Matrix</a>, Jour. Australian Math. Soc. 21 no. 4 (series A) (1976), 487-497.
Graham, R. L.; Lehmer, D. H. On the permanent of Schur's matrix. J. Austral. Math. Soc. Ser. A 21 (1976), no. 4, 487-497.
R. L. Graham, R and D. LH.; Lehmer, D. H., , <a href="httphttps://www.math.ucsddoi.edu/~ronspubsorg/76_07_schurs_matrix10.pdf1017/S1446788700019339">On the Permanent of Schur's Matrix</a>, Jour. Australian Math. Soc. 21 no. 4 (series A) (1976), 487-497.
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Graham, R. L.; Lehmer, D. H., <a href="http://www.math.ucsd.edu/~sbutler/ronronspubs/76_07_schurs_matrix
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_N. J. A. Sloane (njas(AT)research.att.com)_.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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