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A007379 Earliest sequence with a(a(n)) = 4n.
(Formerly M0973)
+0
10
0, 2, 4, 5, 8, 12, 7, 24, 16, 10, 36, 13, 20, 44, 15, 56, 32, 18, 68, 21, 48, 76, 23, 88, 28, 26, 100, 29, 96, 108, 31, 120, 64, 34, 132, 37, 40, 140, 39, 152, 144, 42, 164, 45, 52, 172, 47, 184, 80, 50, 196, 53, 176, 204, 55, 216, 60, 58, 228, 61, 224, 236, 63, 248 (list; graph; listen)
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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.


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