A066705 Greatest k < n such that phi(k) = phi(n) if such k exists, otherwise 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

Links

Table of n, a(n) for n=1..81.

Crossrefs

Cf. A000010, A015126, A028476, A043343, A066659.

Sequence in context: A363028 A364067 A246691 * A277894 A027636 A371737

Adjacent sequences: A066702 A066703 A066704 * A066706 A066707 A066708

Keyword

nonn

Author

Vladeta Jovovic, Jan 14 2002

Status

approved