Template:Seal pyramid/Lonicera/depth/sum
c a |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | Σ |
|---|---|---|---|---|---|---|---|---|---|
| 0 | 1 | 1 | |||||||
| 1 | 1 | 1 | |||||||
| 2 | 1 | 1 | 1 | 3 | |||||
| 3 | 4 | 4 | 2 | 1 | 11 | ||||
| 4 | 20 | 18 | 9 | 3 | 1 | 51 | |||
| 5 | 132 | 106 | 48 | 16 | 4 | 1 | 307 | ||
| 6 | 1172 | 818 | 330 | 100 | 25 | 5 | 1 | 2451 | |
| 7 | 14084 | 8362 | 2928 | 790 | 180 | 36 | 6 | 1 | 26387 |
This is triangle Alder.
- diagonal 0: 1, 1, 1, ...
- diagonal 1: 0, 1, 2, ...
- diagonal 2: square numbers
- diagonal 3: cubic minus square numbers (A045991)