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A053592
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Open 3-dimensional ball numbers (version 1): a(n)= number of integer points (i,j,k) contained in a open ball of diameter n, centered at (0,0,0).
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0
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0, 1, 1, 19, 27, 81, 93, 179, 251, 389, 485, 739, 895, 1189, 1365, 1791, 2103, 2553, 2969, 3695, 4139, 4945, 5497, 6403, 7123, 8217, 9093, 10395, 11459, 12893, 13997, 15515, 17071, 18853, 20377, 22575, 24303, 26745, 28545, 31103, 33371
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