A053474 Cototients of non-cototient numbers: A051953(A005278(n)).

6, 14, 18, 30, 28, 30, 44, 60, 60, 62, 82, 68, 74, 94, 106, 88, 126, 102, 104, 110, 150, 120, 124, 164, 158, 136, 138, 178, 148, 150, 190, 164, 212, 176, 174, 182, 246, 252, 194, 198, 204, 208, 220, 234, 286, 318, 242, 322, 302, 328

Offset

1,1

Comments

The iteration-graph (rooted tree) of A051953 has initial vertices given by A005278. Sequence gives immediate successors of initial terms. The iteration ends at 0 fixed point.

Links

Michel Marcus, Table of n, a(n) for n = 1..10000

Example

30, 60, 150 and 164 occur twice in the terms shown. These numbers occur in A051953, but their arguments do not: 50, 58 or 100, 116 or 222, 298 or 260, 326 are non-cototients, terms of A005278.

Crossrefs

Cf. A005278, A051953.

Sequence in context: A340634 A156858 A032500 * A072204 A037177 A351975

Adjacent sequences: A053471 A053472 A053473 * A053475 A053476 A053477

Keyword

nonn

Author

Labos Elemer, Jan 14 2000

Status

approved