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A007951
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Ternary sieve: delete every 3rd number, then every 9th, 27th, etc.
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6
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1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 17, 19, 20, 22, 23, 25, 28, 29, 31, 32, 34, 35, 37, 38, 41, 43, 46, 47, 49, 50, 52, 55, 56, 58, 59, 61, 62, 64, 65, 68, 70, 71, 73, 74, 76, 77, 79, 82, 83, 85, 86, 88, 91, 92, 95, 97, 98, 100, 101, 103, 104, 106, 109, 110, 112, 113, 115, 116, 118
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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Smarandache calls this a "trinary" sieve. - N. J. A. Sloane, Jan 03 2020
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LINKS
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Rémy Sigrist, Table of n, a(n) for n = 1..25000
F. Smarandache, Only Problems, Not Solutions!, 4th ed., 1993; Problem 96.
Index entries for sequences generated by sieves
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PROG
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(PARI) v = List([1..118]); t=3; while (#v>=t, forstep (k=#v\t, 1, -1, listpop(v, k*t); ); t*=3; ); print (v) \\ Rémy Sigrist, Jan 05 2020
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CROSSREFS
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Cf. A007950.
Sequence in context: A215099 A022768 A229973 * A237590 A207336 A213539
Adjacent sequences: A007948 A007949 A007950 * A007952 A007953 A007954
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KEYWORD
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nonn
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AUTHOR
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R. Muller
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STATUS
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approved
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