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A163126 a(1)=1. a(n) = the number of integers k, 1 <= k <= n-1, where a(k) is coprime to n-k. +0
2
1, 1, 2, 3, 3, 5, 4, 6, 6, 7, 4, 9 (list; graph; listen)
OFFSET

1,3
CROSSREFS

A163127

Sequence in context: A123031 A159070 A088241 this_sequence A088922 A143092 A143089

Adjacent sequences: A163123 A163124 A163125 this_sequence A163127 A163128 A163129

KEYWORD

more,nonn

AUTHOR

Leroy Quet (q1qq2qqq3qqqq(AT)yahoo.com), Jul 21 2009

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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