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Search: id:A080567
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| A080567 |
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1 + Sum_{k=2..n} 2^((prime(k)-1)/2). |
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+0 13
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| 1, 3, 7, 15, 47, 111, 367, 879, 2927, 19311, 52079, 314223, 1362799, 3459951, 11848559, 78957423, 615828335, 1689570159, 10279504751, 44639243119, 113358719855, 663114533743, 2862137789295, 20454323833711, 301929300544367
(list; graph; listen)
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