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 A283598 Numbers n such that all three of 6*n+1, 6*(n+1)+1, and 6*(n+2)+1 are semiprimes. 0
 41, 42, 48, 84, 92, 148, 157, 158, 162, 189, 209, 210, 222, 223, 224, 225, 226, 234, 250, 306, 315, 316, 317, 318, 319, 326, 386, 387, 401, 407, 408, 433, 462, 487, 488, 489, 514, 515, 521, 532, 539, 566, 567, 568, 569, 580, 598, 633, 634, 662, 663, 664, 672, 697, 713, 717, 718 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS That is, n, n+1 and n+2 are terms in A112775. LINKS Table of n, a(n) for n=1..57. MATHEMATICA po[x_]=PrimeOmega[x]; Select[Range[1000], po[6*#+1]==po[6*(1+#)+1]== po[6*(2+#)+1==2 &] CROSSREFS Subsequence of A283597 and A112775. Cf. A112771, A001358. Sequence in context: A165862 A339568 A077680 * A041839 A098064 A073921 Adjacent sequences: A283595 A283596 A283597 * A283599 A283600 A283601 KEYWORD nonn AUTHOR Zak Seidov, Mar 14 2017 STATUS approved

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Last modified November 30 21:14 EST 2023. Contains 367462 sequences. (Running on oeis4.)