A141616 Even terms in A120070.

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

Author

Paul Curtz, Aug 23 2008

Keywords

• nonn
• tabf

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

Examples

			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
...
		

Links

• Michael De Vlieger, Table of n, a(n) for n = 1..10000

Programs

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 *)

Extensions

More terms from Michael De Vlieger, Apr 14 2016