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A049806 Number of Farey fractions of order n that are <=1/2; cf. A049805. +0
2
1, 2, 3, 4, 6, 7, 10, 12, 15, 17, 22, 24, 30, 33, 37, 41, 49, 52, 61, 65, 71, 76, 87, 91, 101, 107, 116, 122, 136, 140, 155, 163, 173, 181, 193, 199, 217, 226, 238, 246, 266, 272, 293, 303, 315, 326, 349, 357, 378, 388, 404, 416, 442 (list; graph; listen)
OFFSET

1,2

CROSSREFS

Partial sums + 1 of A023022.

Sequence in context: A101505 A068713 A099523 this_sequence A158381 A163180 A091515

Adjacent sequences: A049803 A049804 A049805 this_sequence A049807 A049808 A049809

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.


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