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 A109826 Final terms of groups in the partition of the sequence of natural numbers A109411. 3
 3, 4, 8, 9, 10, 15, 17, 20, 21, 22, 35, 38, 39, 42, 44, 46, 48, 49, 53, 59, 61, 62, 68, 69, 71, 73, 74, 88, 92, 93, 94, 95, 98, 103, 105, 106, 108, 110, 111, 114, 115, 125, 127, 134, 139, 143, 145, 146, 148, 150, 152, 158, 159, 161, 164, 169, 171, 174, 178, 183, 189 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS MATHEMATICA s={3}; a=4; Do[Do[If[Plus@@Last/@FactorInteger[(a+x)(x-a+1)/2]==2, a=x+1; AppendTo[s, x]; Break[]], {x, a, 20000}], {k, 1, 100}]; A109826=s CROSSREFS Cf. A109411, A109825. Sequence in context: A075746 A342791 A275096 * A228145 A243064 A057549 Adjacent sequences:  A109823 A109824 A109825 * A109827 A109828 A109829 KEYWORD nonn AUTHOR Zak Seidov, Jul 03 2005 STATUS approved

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Last modified August 7 19:55 EDT 2022. Contains 355994 sequences. (Running on oeis4.)