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 A351875 Positive difference of the distinct prime factors of A129521(n). 0
 1, 2, 6, 18, 30, 36, 78, 96, 138, 156, 198, 210, 228, 270, 306, 330, 336, 366, 378, 438, 498, 546, 576, 600, 606, 618, 660, 690, 726, 810, 828, 876, 936, 966, 996, 1008, 1068, 1170, 1236, 1278, 1296, 1398, 1428, 1458, 1530, 1608, 1626, 1656, 1758, 1866, 2010, 2028, 2088, 2130 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..54. FORMULA a(n) = A005383(n) - A005382(n). a(n) = A005382(n) - 1. - Amiram Eldar, Feb 23 2022 EXAMPLE a(4) = 18; A005383(4) - A005382(4) = 37 - 19 = 18. MATHEMATICA Select[Prime[Range[350]], PrimeQ[2*# - 1] &] - 1 (* Amiram Eldar, Feb 23 2022 *) CROSSREFS Cf. A005382, A005383, A129521. Sequence in context: A257065 A066286 A324541 * A197168 A373515 A288815 Adjacent sequences: A351872 A351873 A351874 * A351876 A351877 A351878 KEYWORD nonn AUTHOR Wesley Ivan Hurt, Feb 22 2022 STATUS approved

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Last modified September 16 15:31 EDT 2024. Contains 375976 sequences. (Running on oeis4.)