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8, 12, 24, 16, 32, 20, 48, 40, 24, 60, 48, 28, 80, 72, 56, 32, 96, 84, 64, 36, 120, 112, 96, 72, 40, 140, 128, 108, 80, 44, 168, 160, 144, 120, 88, 48, 192, 180, 160, 132, 96, 52, 224, 216, 200, 176, 144, 104, 56, 252, 240, 220, 192, 156, 112, 60, 288, 280, 264, 240, 208, 168, 120, 64, 320, 308, 288
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history;
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internal format)
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OFFSET
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1,1
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COMMENTS
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All terms are multiples of 4.
Row length L = Ceiling(n/2 - 1), thus the smallest value of n in A120070 to produce even terms is n = 3. - Michael De Vlieger, Apr 14 2016
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LINKS
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Michael De Vlieger, Table of n, a(n) for n = 1..10000
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EXAMPLE
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Irregular triangle:
n Even values of A120070(n)
3 8
4 12
5 24 16
6 32 20
7 48 40 24
8 60 48 28
9 80 72 56 32
10 96 84 64 36
11 120 112 96 72 40
12 140 128 108 80 44
...
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MATHEMATICA
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Table[n^2 - k^2, {n, 3, 18}, {k, n}] /. m_ /; Or[OddQ@ m, m == 0] -> Nothing // Flatten (* Michael De Vlieger, Apr 14 2016, after Alonso del Arte at A120070 *)
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CROSSREFS
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Sequence in context: A189322 A105571 A350633 * A326994 A278902 A336583
Adjacent sequences: A141613 A141614 A141615 * A141617 A141618 A141619
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KEYWORD
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nonn,tabf
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AUTHOR
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Paul Curtz, Aug 23 2008
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EXTENSIONS
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More terms from Michael De Vlieger, Apr 14 2016
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STATUS
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approved
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