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

Author

Mitch Harris, Jun 20 2005

Keywords

• nonn
• easy

Examples

			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.