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Search: id:A092404
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A092404 phi(n)+phi(n+1). +0
1
2, 3, 4, 6, 6, 8, 10, 10, 10, 14, 14, 16, 18, 14, 16, 24, 22, 24, 26, 20, 22, 32, 30, 28, 32, 30, 30, 40, 36, 38, 46, 36, 36, 40, 36, 48, 54, 42, 40, 56, 52, 54, 62, 44, 46, 68, 62, 58, 62, 52, 56, 76, 70, 58, 64, 60, 64, 86, 74, 76 (list; graph; listen)
OFFSET

1,1

PROGRAM

(PARI) for(i=1, 60, print1(", "eulerphi(i)+eulerphi(i+1)))

CROSSREFS

Cf. A000010.

Sequence in context: A142727 A112275 A034298 this_sequence A094871 A157450 A079667

Adjacent sequences: A092401 A092402 A092403 this_sequence A092405 A092406 A092407

KEYWORD

nonn

AUTHOR

Jon Perry (perry(AT)globalnet.co.uk), Mar 22 2004

page 1

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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