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 A071814 Numbers k such that the number of 1's in the binary representation of k equals bigomega(k), the number of prime divisors of k (counted with multiplicity). 31
 2, 6, 9, 10, 28, 33, 34, 42, 44, 50, 52, 54, 60, 65, 70, 76, 90, 98, 129, 135, 138, 148, 150, 156, 164, 184, 198, 204, 210, 225, 228, 232, 261, 266, 268, 273, 290, 292, 294, 297, 306, 308, 322, 330, 340, 344, 385, 388, 390, 405, 424, 440, 468, 486, 496, 504 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A115156 is a subsequence: A001222(A115156(n)) = A000120(A115156(n)) = n. - Reinhard Zumkeller, Jan 14 2006 LINKS Ivan Neretin, Table of n, a(n) for n = 1..10000 EXAMPLE 232 is a term because 232 = 11101000_2 and 232 = 2^3*29. MATHEMATICA fQ[n_] := Count[IntegerDigits[n, 2], 1] == Plus @@ Last /@ FactorInteger@n; Select[ Range@517, fQ[ # ] &] (* Robert G. Wilson v, Jan 18 2006 *) Select[Range[600], Count[IntegerDigits[#, 2], 1]==PrimeOmega[#]&] (* Harvey P. Dale, Mar 07 2019 *) CROSSREFS Cf. A000120, A001222, A071594, A115156. Sequence in context: A109600 A370802 A370810 * A066586 A146974 A133160 Adjacent sequences: A071811 A071812 A071813 * A071815 A071816 A071817 KEYWORD easy,nonn AUTHOR Jason Earls, Jun 07 2002 STATUS approved

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Last modified May 26 09:40 EDT 2024. Contains 372824 sequences. (Running on oeis4.)