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A120701 Number of unit circles which fit touching a circle of radius n-1, i.e. with their centers on a circle of radius n. +0
2
2, 6, 9, 12, 15, 18, 21, 25, 28, 31, 34, 37, 40, 43, 47, 50, 53, 56, 59, 62, 65, 69, 72, 75, 78, 81, 84, 87, 91, 94, 97, 100, 103, 106, 109, 113, 116, 119, 122, 125, 128, 131, 135, 138, 141, 144, 147, 150, 153, 157, 160, 163, 166, 169, 172, 175, 179, 182, 185, 188 (list; graph; listen)
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Last modified December 20 13:54 EST 2009. Contains 171081 sequences.


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