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 A325249 Sum of the omega-sequence of n. 26
 0, 1, 1, 3, 1, 5, 1, 4, 3, 5, 1, 8, 1, 5, 5, 5, 1, 8, 1, 8, 5, 5, 1, 9, 3, 5, 4, 8, 1, 7, 1, 6, 5, 5, 5, 7, 1, 5, 5, 9, 1, 7, 1, 8, 8, 5, 1, 10, 3, 8, 5, 8, 1, 9, 5, 9, 5, 5, 1, 12, 1, 5, 8, 7, 5, 7, 1, 8, 5, 7, 1, 10, 1, 5, 8, 8, 5, 7, 1, 10, 5, 5, 1, 12, 5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS We define the omega-sequence of n (row n of A323023) to have length A323014(n) = adjusted frequency depth of n, and the k-th term is Omega(red^{k-1}(n)), where Omega = A001222 and red^{k} is the k-th functional iteration of red = A181819, defined by red(n = p^i*...*q^j) = prime(i)*...*prime(j) = product of primes indexed by the prime exponents of n. For example, we have 180 -> 18 -> 6 -> 4 -> 3, so the omega-sequence of 180 is (5,3,2,2,1). LINKS FORMULA a(n) = A056239(A325248(n)). a(n!) = A325274(n). EXAMPLE The omega-sequence of 180 is (5,3,2,2,1) with sum 13, so a(180) = 13. MATHEMATICA omseq[n_Integer]:=If[n<=1, {}, Total/@NestWhileList[Sort[Length/@Split[#]]&, Sort[Last/@FactorInteger[n]], Total[#]>1&]]; Table[Total[omseq[n]], {n, 100}] CROSSREFS Positions of m's are A000040 (m = 1), A001248 (m = 3), A030078 (m = 4), A068993 (m = 5), A050997 (m = 6), A325264 (m = 7). Cf. A056239, A118914, A181819, A182850, A323023, A325274. Omega-sequence statistics: A001222 (first omega), A001221 (second omega), A071625 (third omega), A323022 (fourth omega), A304465 (second-to-last omega), A182850 or A323014 (length/frequency depth), A325248 (Heinz number). Sequence in context: A274532 A254765 A300893 * A208239 A114567 A001051 Adjacent sequences:  A325246 A325247 A325248 * A325250 A325251 A325252 KEYWORD nonn AUTHOR Gus Wiseman, Apr 16 2019 STATUS approved

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Last modified October 18 05:45 EDT 2019. Contains 328146 sequences. (Running on oeis4.)