

A085885


Let r and s be such that r + s = n; a(n) = maximum value of phi(r) + phi(s).


1



2, 2, 3, 3, 5, 5, 7, 7, 8, 8, 11, 11, 13, 13, 14, 14, 17, 17, 19, 19, 20, 20, 23, 23, 24, 24, 26, 24, 29, 29, 31, 31, 32, 32, 34, 32, 37, 37, 38, 38, 41, 41, 43, 43, 44, 44, 47, 47, 48, 48, 50, 48, 53, 53, 54, 54, 56, 54, 59, 59, 61, 61, 62, 62, 64, 62, 67, 67, 68, 68, 71, 71, 73
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OFFSET

2,1


LINKS

Table of n, a(n) for n=2..74.


EXAMPLE

a(8) = 7, the partitions are ( 1,7),(2,6),(3,5),(4,4) which give 7, 3, 6,4 as the sum of phi functions of both the parts.


CROSSREFS

Sequence in context: A035032 A121260 A121261 * A309685 A309683 A283529
Adjacent sequences: A085882 A085883 A085884 * A085886 A085887 A085888


KEYWORD

nonn


AUTHOR

Amarnath Murthy, Jul 08 2003


EXTENSIONS

More terms from David Wasserman, Feb 10 2005


STATUS

approved



