login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A271579 Magic sums of 4 X 4 magic squares composed of triangular numbers. 5
1402, 1912, 2162, 2164, 2422, 2612, 3362, 3512, 3737, 3952, 4207, 4257, 4322, 4462, 4887, 4972, 5312, 5362, 5442, 5466, 5482, 5593, 5986, 5992, 6162, 6337, 6438, 6532, 6662, 6747, 6792, 6887, 6974, 6987, 7112, 7177, 7437, 7507, 7662, 7975, 8032, 8222 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
Examples of 4 X 4 magic squares composed of triangular numbers.
.
|----|----|----|----|
| 66 | 1 | 300|1035|
|----|----|----|----|
| 465| 630| 171| 136|
|----|----|----|----|
| 780| 105| 496| 21 |
|----|----|----|----|
| 91 | 666| 435| 210|
|----|----|----|----|
The magic constant is 1402 = a(1).
.
|----|----|----|----|
| 1 | 45 | 435|1431|
|----|----|----|----|
| 300|1326| 276| 10 |
|----|----|----|----|
|1596| 190| 120| 6 |
|----|----|----|----|
| 15 | 351|1081| 465|
|----|----|----|----|
The magic constant is 1912 = a(2).
CROSSREFS
Cf. A000217, A271580, A271711. Subsequence of A271581.
Sequence in context: A271549 A203918 A178271 * A271712 A352239 A206680
KEYWORD
nonn
AUTHOR
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 20 16:37 EDT 2024. Contains 371845 sequences. (Running on oeis4.)