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A001845 Centered octahedral numbers (crystal ball sequence for cubic lattice).
(Formerly M4384 N1844)
+0
27
1, 7, 25, 63, 129, 231, 377, 575, 833, 1159, 1561, 2047, 2625, 3303, 4089, 4991, 6017, 7175, 8473, 9919, 11521, 13287, 15225, 17343, 19649, 22151, 24857, 27775, 30913, 34279, 37881, 41727, 45825, 50183, 54809, 59711, 64897, 70375, 76153, 82239 (list; graph; listen)
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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.


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