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Search: id:A115567
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| A115567 |
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C(n,6) + C(n,5) + C(n,4) + C(n,3) + C(n,2) + C(n,1). |
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+0
2
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| 0, 1, 3, 7, 15, 31, 63, 126, 246, 465, 847, 1485, 2509, 4095, 6475, 9948, 14892, 21777, 31179, 43795, 60459, 82159, 110055, 145498, 190050, 245505, 313911, 397593, 499177, 621615, 768211, 942648, 1149016, 1391841, 1676115, 2007327, 2391495
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