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A105799
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Self-describing sequence: 2 prime numbers, then 3 composites, then 4 primes, then 6 composites, then 8 primes, then 11 composites, then 13 primes, etc.
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2, 3, 4, 6, 8, 11, 13, 17, 19, 20, 21, 22, 24, 25, 26, 29, 31, 37, 41, 43, 47, 53, 59, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 150, 152, 153, 154, 155, 156, 158
(list; graph; refs; listen; history; internal format)
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OFFSET
| 2,1
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EXAMPLE
| 2 3 4 6 8 11 13 17 19 20 21 22 24 25 26 29 31 37 41 43 47 53 59 ...
^ ^ - - - ^^ ^^ ^^ ^^ -- -- -- -- -- -- ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^
.2....3........4..............6....................8....
pri..comp....primes.......composites.............primes
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CROSSREFS
| Sequence in context: A060469 A080329 A002858 * A102463 A056829 A071764
Adjacent sequences: A105796 A105797 A105798 * A105800 A105801 A105802
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KEYWORD
| base,easy,nonn
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AUTHOR
| Eric Angelini (eric.angelini(AT)kntv.be), May 05 2005
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