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Search: id:A135482
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| A135482 |
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a(n) = [sum(i=0,n,2^p(i)]/4, where p(i) denotes i-th prime number. |
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| 1, 3, 11, 43, 555, 2603, 35371, 166443, 2263595, 136481323, 673352235, 35033090603, 584788904491, 2783812160043, 37968184248875
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