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A119257
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A permutation of the positive integers made by reversing the order of the composites within each run of composites (1 and primes are left alone).
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0
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1, 2, 3, 4, 5, 6, 7, 10, 9, 8, 11, 12, 13, 16, 15, 14, 17, 18, 19, 22, 21, 20, 23, 28, 27, 26, 25, 24, 29, 30, 31, 36, 35, 34, 33, 32, 37, 40, 39, 38, 41, 42, 43, 46, 45, 44, 47, 52, 51, 50, 49, 48, 53, 58, 57, 56, 55, 54, 59, 60, 61, 66, 65, 64, 63, 62, 67, 70, 69, 68, 71, 72
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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EXAMPLE
| The run of composites (24,25,26,27,28) becomes (28,27,26,25,24).
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PROG
| (PARI) {m=73; print1(1, ", "); n=2; while(n<=m, while(isprime(n), print1(n, ", "); n++); k=n; while(!isprime(n), n++); forstep(a=n-1, k, -1, print1(a, ", ")))} - (Klaus Brockhaus, Aug 16 2006)
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CROSSREFS
| Sequence in context: A072794 A181820 A199426 * A102455 A073678 A031981
Adjacent sequences: A119254 A119255 A119256 * A119258 A119259 A119260
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KEYWORD
| nonn
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AUTHOR
| Leroy Quet Jul 23 2006
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EXTENSIONS
| More terms from Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Aug 16 2006
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