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Search: id:A062948
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| 1, 1, 2, 3, 2, 2, 3, 4, 4, 3, 4, 6, 5, 4, 10, 6, 9, 6, 4, 8, 10, 8, 12, 6, 9, 12, 8, 6, 10, 12, 11, 8, 21, 10, 16, 12, 9, 20, 12, 18, 14, 8, 15, 18, 16, 24, 10, 16, 22, 12, 12, 18, 20, 18, 30, 12, 16, 27, 20, 12, 32, 21, 28, 20, 12, 36, 22, 30, 23, 36, 16, 21, 30, 20, 16, 24, 24, 26
(list; graph; listen)
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OFFSET
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1,3
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LINKS
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Harry J. Smith, Table of n, a(n) for n=1,...,1000
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PROGRAM
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(PARI) H(n)=eulerphi(n)/2; j=[]; for(n=2, 200, if(isprime(n), n+1, j=concat(j, H(n) ))); j
(PARI) { n=0; for (m=2, 10^9, if (!isprime(m), write("b062948.txt", n++, " ", eulerphi(m)/2); if (n==1000, break)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Aug 14 2009]
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CROSSREFS
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Cf. A023022, A002808.
Sequence in context: A104377 A109337 A137266 this_sequence A096258 A049879 A053812
Adjacent sequences: A062945 A062946 A062947 this_sequence A062949 A062950 A062951
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KEYWORD
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easy,nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Jul 21 2001
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EXTENSIONS
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OFFSET changed from 2,3 to 1,3 by Harry J. Smith (hjsmithh(AT)sbcglobal.net), Aug 14 2009
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