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A141616
Even terms in A120070.
3
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
OFFSET
1,1
COMMENTS
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
LINKS
EXAMPLE
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
...
MATHEMATICA
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 *)
CROSSREFS
Sequence in context: A189322 A105571 A350633 * A368549 A326994 A367146
KEYWORD
nonn,tabf
AUTHOR
Paul Curtz, Aug 23 2008
EXTENSIONS
More terms from Michael De Vlieger, Apr 14 2016
STATUS
approved