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Search: id:A075345
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| A075345 |
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Group the natural numbers such that the n-th group contains n terms and the group sum is the smallest possible prime: (2), (1, 4), (3, 5, 9), (6, 7, 8, 10), (11, 12, 13, 14, 17), (15, 16, 18, 19, 20, 21), ... Sequence gives group sums. |
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4
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| 2, 5, 17, 31, 67, 109, 179, 257, 373, 503, 673, 877, 1093, 1381, 1693, 2063, 2459, 2927, 3449, 4001, 4637, 5347, 6089, 6947, 7817, 8783, 9857, 10987, 12211, 13513, 14923, 16411, 17971, 19661, 21467, 23333, 25343, 27457, 29683, 32027, 34469, 37087
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