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a(1514) from McKenzie added by Andrey Zabolotskiy, Jan 18 2023
6, 24, 132, 816, 5448, 38808, 290568, 2255232, 17981532, 146428728, 1213014960, 10192820592, 86687830596, 744919762584
S. McKenzie, <a href="https://doi.org/10.1088/0305-4470/16/12/033">Extended high-temperature series expansions for the spin-s Ising model</a>, J. Phys. A: Math. Gen., 16 (1983), 2875-2880. See table 1, column c(n); divide by 2 to get a(n).
a(15) from McKenzie added by Andrey Zabolotskiy, Jan 18 2023
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Name clarified and a(12)-a(13) added by Andrey Zabolotskiy, Feb 14 2022
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