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1, 1, 4, 5, 26, 22, 120, 149, 418, 716, 2036, 2378, 8178, 12846, 29294, 50709, 131054, 193972, 524268, 843260, 1979520, 3488618, 8388584, 13190042, 33501276, 56707912, 129527950, 227113934, 536870882, 887838482, 2147483616
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OFFSET
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1,3
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COMMENTS
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If p is prime then a(p) = 2^p-p-1. If p=7, a(7)=120.
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LINKS
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PROG
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(PARI) a(n) = 2^n - sumdiv(n, d, binomial(n, d)); \\ Michel Marcus, Aug 25 2019
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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