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A023227 Numbers n such that n and 7n + 10 both prime. +0
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3, 7, 13, 31, 37, 43, 67, 73, 79, 109, 139, 157, 163, 181, 193, 211, 223, 229, 241, 271, 277, 367, 373, 379, 397, 421, 433, 439, 457, 463, 523, 541, 571, 577, 601, 607, 661, 673, 709, 727, 757, 769, 787, 829, 853, 907, 937, 967, 991, 1039, 1063, 1117, 1153, 1213 (list; graph; listen)
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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.


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