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A217018
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Partial sums of 3-almost primes which are again 3-almost primes, i.e., have exactly 3 not necessarily distinct prime factors.
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1
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8, 20, 964, 1825, 2074, 2637, 3614, 3786, 4503, 5283, 5495, 6414, 6652, 7138, 7383, 9485, 9764, 10330, 10615, 11191, 12427, 12749, 13074, 15475, 16195, 16930, 18446, 19233, 20855, 22108, 22959, 23387, 28273, 28747, 29222, 30676, 32695, 34798, 35871
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OFFSET
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1,1
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COMMENTS
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Bigomega=3 analog of the semiprime version A092190. In sequence A086062 it was asked whether there are infinitely many such numbers.
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LINKS
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FORMULA
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PROG
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(PARI) A217018(n, list=0, N=0, S=0)={until(!n--, until(bigomega(S+=N)==3, until(bigomega(N++)==3, )); list&print1(S", ")); S} \\ - M. F. Hasler, Sep 29 2012
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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