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 A328738 Numbers k such that at least one of sopfr(k-1) and sopfr(k+1) is greater than or equal to 4*sopfr(k). 2
 48, 54, 60, 66, 70, 72, 78, 80, 84, 88, 90, 96, 98, 100, 102, 104, 108, 110, 112, 114, 126, 128, 130, 132, 135, 136, 138, 140, 147, 150, 152, 156, 162, 165, 168, 174, 180, 182, 190, 192, 195, 196, 198, 200, 210, 222, 224, 225, 228, 230, 232, 234 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS k-1 or k+1 or both have sums of prime factors at least 4 times the sum of prime factors of k. LINKS Table of n, a(n) for n=1..52. CROSSREFS Cf. A001414, A328736, A328737. Sequence in context: A364702 A357429 A258694 * A067191 A080854 A255267 Adjacent sequences: A328735 A328736 A328737 * A328739 A328740 A328741 KEYWORD nonn AUTHOR Robert Bilinski, Oct 26 2019 STATUS approved

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Last modified June 16 04:47 EDT 2024. Contains 373420 sequences. (Running on oeis4.)