A271578 Magic sums of 4 X 4 magic squares composed of primes.

120, 126, 132, 136, 138, 140, 142, 144, 146, 148, 150, 154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 182, 184, 186, 188, 190, 192, 194, 196, 198, 200, 202, 204, 206, 208, 210, 212, 214, 216, 218, 220, 222, 224, 226, 228, 230, 232, 234

Offset: 1

Author

Arkadiusz Wesolowski, Apr 10 2016

Keywords

• nonn

Comments

I conjecture that every even number greater than 152 belongs to this sequence.

Examples

			Examples of 4 X 4 magic squares composed of primes.
.
|---|---|---|---|
| 3 | 7 | 43| 67|
|---|---|---|---|
| 31| 61| 17| 11|
|---|---|---|---|
| 73| 23| 19| 5 |
|---|---|---|---|
| 13| 29| 41| 37|
|---|---|---|---|
The magic constant is 120 = a(1).
.
|---|---|---|---|
| 3 | 7 | 43| 73|
|---|---|---|---|
| 31| 67| 17| 11|
|---|---|---|---|
| 79| 23| 19| 5 |
|---|---|---|---|
| 13| 29| 47| 37|
|---|---|---|---|
The magic constant is 126 = a(2).
		

Links

• Wikipedia, Magic square
• Index entries for sequences related to magic squares

Crossrefs

Cf. A000040, A164843, A268790.

Formula

If conjecture is true, a(n) = A005843(n+65) for n >= 12.