A109150 Numbers k such that the continued fraction sequence of sqrt(k) is not multiplicative.

2, 5, 6, 10, 11, 12, 17, 18, 19, 20, 21, 26, 27, 28, 29, 30, 31, 37, 38, 39, 40, 41, 42, 43, 45, 46, 50, 51, 52, 53, 54, 55, 56, 57, 61, 65, 66, 67, 68, 69, 70, 71, 72, 73, 76, 77, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 97, 101, 102, 103, 104, 105, 106, 107

Offset

1,1

Links

Table of n, a(n) for n=1..67.

Example

The continued fraction of sqrt(21) is (4; 1, 1, 2, 1, 1, 8, ...) = A010125, which is not multiplicative since c(2) = 1, c(3) = 2, but c(6) = 8.

Crossrefs

Complement of A109054.

Sequence in context: A375739 A244731 A307562 * A004202 A013647 A377167

Adjacent sequences: A109147 A109148 A109149 * A109151 A109152 A109153

Keyword

nonn,easy

Author

Mitch Harris, Jun 20 2005

Status

approved