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A168098
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a(n) = number of natural numbers m such that n - 8 <= m <= n + 8.
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0
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8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17
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OFFSET
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0,1
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COMMENTS
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Generalisation: If a(n,k) = number of natural numbers m such that n - k <= m <= n + k (k >= 1) then a(n,k) = a(n-1,k) + 1 = n + k for 0 <= n <= k, a(n,k) = a(n-1,k) = 2k + 1 for n >= k + 1 (see e.g. A158799). a(n) = 8 + n for 0 <= n <= 8, a(n) = 17 for n >= 9.
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LINKS
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Table of n, a(n) for n=0..39.
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CROSSREFS
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Sequence in context: A217292 A004164 A004449 * A020722 A046037 A089017
Adjacent sequences: A168095 A168096 A168097 * A168099 A168100 A168101
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KEYWORD
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nonn
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AUTHOR
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Jaroslav Krizek, Nov 18 2009
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STATUS
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approved
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