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A109150 Numbers n such that the continued fraction sequence of sqrt(n) is not multiplicative. 0
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 (list; graph; refs; listen; history; text; internal format)
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, ...), which is not multiplicative since a(2) = 1, a(3) = 2, but a(6) = 8.

CROSSREFS

Complement of A109054.

Sequence in context: A184418 A112967 A244731 * A004202 A013647 A255068

Adjacent sequences:  A109147 A109148 A109149 * A109151 A109152 A109153

KEYWORD

nonn,easy

AUTHOR

Mitch Harris, Jun 20 2005

STATUS

approved

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Last modified February 16 21:03 EST 2019. Contains 320190 sequences. (Running on oeis4.)