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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 (list; graph; refs; listen; history; text; internal format)
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 * A326994 A278902 A336583

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

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Last modified May 21 05:07 EDT 2022. Contains 353887 sequences. (Running on oeis4.)