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 A364435 The first term in a run of at least 4 consecutive numbers each with exactly 5 distinct prime factors (i.e. belong to A051270). 0
 21871365, 37055184, 37227993, 39272583, 41205603, 43067463, 44012682, 44126949, 47761635, 48806274, 49362234, 49613484, 50582103, 52953795, 54244068, 60529077, 60988653, 61042069, 62319465, 63850344, 66068793, 66709683, 66710004, 67874079, 67974312, 68294148, 68529900 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..27. EXAMPLE 21871365 is in the sequence as it starts a run of at least 4 consecutive numbers each with exactly 5 distinct prime factors. That is each of 21871365 = 3 * 5 * 29 * 137 * 367, 21871365 + 1 = 21871366 = 2 * 11 * 37 * 97 * 277, 21871365 + 2 = 21871367 = 7*17*23*61*131, 21871365 + 3 = 21871368 = 2^3 * 3^2 * 31 * 41 * 239 have 5 distinct prime factors. PROG (PARI) upto(n) = {my(res = List(), streak = 0); n+=3; forfactored(i = 1, n, if(omega(i[2]) == 5, streak++; if(streak >= 4, listput(res, i[1]-3)), streak = 0)); res} CROSSREFS Cf. A051270, A364266. Sequence in context: A250912 A251998 A210389 * A118860 A186595 A210076 Adjacent sequences: A364432 A364433 A364434 * A364436 A364437 A364438 KEYWORD nonn AUTHOR David A. Corneth, Jul 24 2023 STATUS approved

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Last modified August 15 01:22 EDT 2024. Contains 375171 sequences. (Running on oeis4.)