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A013921 a(n) is composite and is sum of first k composites for some k. +0
4
4, 10, 18, 27, 49, 63, 78, 94, 112, 132, 153, 175, 224, 250, 305, 335, 400, 434, 469, 505, 543, 582, 622, 664, 708, 753, 799, 847, 896, 946, 1158, 1214, 1271, 1329, 1389, 1514, 1578, 1643, 1846, 1916, 1988, 2062, 2290, 2368, 2448, 2529, 2611, 2695, 2780, 2866 (list; graph; listen)
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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.


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