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Search: id:A121527
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| A121527 |
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a(0)=1. a(n) = n-th integer from among those positive integers which are coprime to the sum of the previous terms of this sequence. |
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+0
2
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| 1, 1, 3, 3, 7, 8, 6, 7, 23, 9, 21, 11, 29, 19, 27, 22, 16, 25, 43, 19, 73, 21, 43, 25, 89, 26, 26, 40, 28, 31, 97, 32, 47, 65, 35, 103, 37, 81, 41, 101, 59, 117, 44, 50, 65, 89, 57, 93, 59, 173, 52, 76, 82, 53, 133, 55, 167, 83, 117, 73, 143, 61, 123, 78, 70, 97, 173, 110, 72
(list; graph; listen)
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OFFSET
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0,3
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LINKS
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Leroy Quet, Home Page (listed in lieu of email address)
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EXAMPLE
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36 = the sum of the terms a(0) to a(7), 36 = 1+1+3+3+7+8+6+7. 1,5,7,11,13,17,19,23,25... are the positive integers which are coprime to 36. 23 is the 8th of these integers, so a(8) = 23.
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PROGRAM
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(PARI) {m=68; print1(1, ", "); s=1; for(n=1, m, k=n; c=0; while(k>0, c++; if(gcd(s, c)==1, k--)); print1(c, ", "); s=s+c)} - (Klaus Brockhaus, Aug 15 2006)
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CROSSREFS
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Cf. A121528.
Sequence in context: A147103 A003133 A021300 this_sequence A021886 A161416 A117989
Adjacent sequences: A121524 A121525 A121526 this_sequence A121528 A121529 A121530
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KEYWORD
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nonn
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AUTHOR
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Leroy Quet Aug 05 2006
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EXTENSIONS
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More terms from Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Aug 15 2006
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