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A007951 Ternary sieve: delete every 3rd number, then every 9th, 27th, etc. 6
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)
OFFSET

1,2

COMMENTS

Smarandache calls this a "trinary" sieve. - N. J. A. Sloane, Jan 03 2020

LINKS

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

PROG

(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

CROSSREFS

Cf. A007950.

Sequence in context: A215099 A022768 A229973 * A237590 A207336 A213539

Adjacent sequences:  A007948 A007949 A007950 * A007952 A007953 A007954

KEYWORD

nonn

AUTHOR

R. Muller

STATUS

approved

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Last modified March 8 13:59 EST 2021. Contains 341949 sequences. (Running on oeis4.)