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A093872 Least composite number with sum of the prime divisors = n, or zero if no such number exists. 1
0, 4, 9, 0, 6, 0, 10, 15, 14, 21, 121, 35, 22, 33, 26, 39, 210, 65, 34, 51, 38, 57, 273, 95, 46, 69, 285, 115, 399, 161, 58, 87, 62, 93, 741, 155, 435, 217, 74, 111, 651, 185, 82, 123, 86, 129, 777, 215, 94, 141, 645, 235, 903, 329, 106, 159, 987, 265, 1645, 371, 118 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
MATHEMATICA
sopf[n_] := Plus @@ First @ Transpose @ FactorInteger[n]; m = 100; seq = Table[0, {m}]; c = 0; n = 4; While[c < m - 3, If[CompositeQ[n], s = sopf[n]; If[s <= m && seq[[s]] == 0, c++; seq[[s]] = n]]; n++]; seq (* Amiram Eldar, Feb 23 2020 *)
CROSSREFS
Cf. A008472.
Sequence in context: A021208 A298813 A021675 * A097906 A070016 A243372
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Apr 20 2004
EXTENSIONS
Corrected and extended by Robert Gerbicz, Aug 21 2006
STATUS
approved

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Last modified March 29 06:15 EDT 2024. Contains 371265 sequences. (Running on oeis4.)