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

1,1

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

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

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

Adjacent sequences: A141613 A141614 A141615 * A141617 A141618 A141619

Keyword

nonn,tabf

Author

Paul Curtz, Aug 23 2008

Extensions

More terms from Michael De Vlieger, Apr 14 2016

Status

approved