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A097455
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GCD(prime(n)+1,composite(n)).
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0
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1, 4, 6, 8, 3, 2, 6, 2, 3, 2, 2, 2, 21, 22, 24, 1, 2, 1, 4, 6, 2, 1, 2, 5, 2, 2, 13, 4, 2, 2, 1, 2, 6, 7, 50, 1, 2, 2, 1, 2, 3, 2, 12, 2, 9, 8, 1, 2, 4, 23, 2, 24, 2, 3, 2, 11, 6, 16, 1, 2, 4, 1, 2, 3, 2, 6, 1, 2, 3, 2, 1, 24, 2, 11, 20, 6, 26, 1, 2, 2, 10, 1, 16, 2, 5, 4, 9, 2, 7, 8, 1, 2, 1, 4, 125
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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PROG
| (PARI) primecompgcd(n) = { for(x=1, n, y=gcd(prime(x)+1, composite(x)); print1(y", ") ) } \ the n-th composite composite(n) = { local(c, x); c=1; x=0; while(c <= n, x++; if(!isprime(x), c++); ); return(x) }
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CROSSREFS
| Sequence in context: A206798 A200366 A179371 * A201520 A179022 A021685
Adjacent sequences: A097452 A097453 A097454 * A097456 A097457 A097458
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KEYWORD
| nonn
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AUTHOR
| Cino Hilliard (hillcino368(AT)gmail.com), Aug 23 2004
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