login
A066705
Greatest k < n such that phi(k) = phi(n) if such k exists, otherwise 0.
0
0, 1, 0, 3, 0, 4, 0, 5, 7, 8, 0, 10, 0, 9, 0, 15, 0, 14, 0, 16, 13, 11, 0, 20, 0, 21, 19, 26, 0, 24, 0, 17, 25, 32, 0, 28, 0, 27, 35, 34, 0, 36, 0, 33, 39, 23, 0, 40, 43, 44, 0, 45, 0, 38, 41, 52, 37, 29, 0, 48, 0, 31, 57, 51, 0, 50, 0, 64, 0, 56, 0, 70, 0, 63, 55, 74, 61, 72, 0, 68, 0
OFFSET
1,4
CROSSREFS
KEYWORD
nonn
AUTHOR
Vladeta Jovovic, Jan 14 2002
STATUS
approved