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 A215142 Numbers n such that the difference between the greatest prime divisor of n and the sum of the other distinct prime divisors equals 1. 3
 6, 12, 18, 24, 36, 48, 54, 72, 96, 108, 144, 162, 192, 216, 231, 288, 324, 330, 384, 432, 455, 486, 546, 576, 648, 660, 663, 693, 768, 864, 935, 972, 990, 1092, 1122, 1152, 1235, 1296, 1311, 1320, 1458, 1463, 1482, 1536, 1617, 1638, 1650, 1728, 1944, 1955 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A033845 is included in this sequence. LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 EXAMPLE 1235 is in the sequence because 1235 = 5*13*19 and 19 - (5+13) = 1. MAPLE with(numtheory):for n from 2 to 2000 do:x:=factorset(n):m:=nops(x):s:=0: s:=sum( ' x[i] ', 'i'=1..m):q:=s-x[m]:if x[m]-q =1 then printf(`%d, `, n):else fi:od: MATHEMATICA gpdQ[n_]:=Module[{f=Transpose[FactorInteger[n]][[1]]}, Max[f]-Total[ Most[ f]] == 1]; Select[Range[2, 2000], gpdQ] (* Harvey P. Dale, Aug 28 2013 *) CROSSREFS Cf. A033845. Sequence in context: A353530 A244193 A329878 * A033845 A187778 A344471 Adjacent sequences: A215139 A215140 A215141 * A215143 A215144 A215145 KEYWORD nonn AUTHOR Michel Lagneau, Aug 04 2012 STATUS approved

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Last modified August 8 10:02 EDT 2024. Contains 375019 sequences. (Running on oeis4.)