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Search: id:A075378
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| A075378 |
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Rearrangement of natural numbers with a(1) = 1, a(2n) square-free and a(2n+1) not square-free. |
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+0
2
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| 1, 2, 4, 3, 8, 5, 9, 6, 12, 7, 16, 10, 18, 11, 20, 13, 24, 14, 25, 15, 27, 17, 28, 19, 32, 21, 36, 22, 40, 23, 44, 26, 45, 29, 48, 30, 49, 31, 50, 33, 52, 34, 54, 35, 56, 37, 60, 38, 63, 39, 64, 41, 68, 42, 72, 43, 75, 46, 76, 47, 80, 51, 81, 53, 84, 55, 88, 57, 90, 58, 92, 59
(list; graph; listen)
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OFFSET
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1,2
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PROGRAM
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(PARI) print1(1, ", "); p1=2; p2=4; for(i=2, 100, if(i%2==0, while(!issquarefree(p1), p1++); print1(p1, ", "); p1++, while(issquarefree(p2), p2++); print1(p2, ", "); p2++)) - Lambert Herrgesell (zero815(AT)googlemail.com), Mar 09 2006
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CROSSREFS
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Sequence in context: A098709 A054238 A048679 this_sequence A101905 A053211 A131390
Adjacent sequences: A075375 A075376 A075377 this_sequence A075379 A075380 A075381
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 22 2002
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EXTENSIONS
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More terms from Lambert Herrgesell (zero815(AT)googlemail.com), Mar 09 2006
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