A001477 as a triangular array
| | | | | | | | | | | | 0 |
| | | | | | | | | | | | 1 | | 2 |
| | | | | | | | | | | 3 | | 4 | | 5 |
| | | | | | | | | | 6 | | 7 | | 8 | | 9 |
| | | | | | | | | 10 | | 11 | | 12 | | 13 | | 14 |
| | | | | | | | 15 | | 16 | | 17 | | 18 | | 19 | | 20 |
| | | | | | | 21 | | 22 | | 23 | | 24 | | 25 | | 26 | | 27 |
| | | | | | 28 | | 29 | | 30 | | 31 | | 32 | | 33 | | 34 | | 35 |
| | | | | 36 | | 37 | | 38 | | 39 | | 40 | | 41 | | 42 | | 43 | | 44 |
| | | | 45 | | 46 | | 47 | | 48 | | 49 | | 50 | | 51 | | 52 | | 53 | | 54 |
| | | 55 | | 56 | | 57 | | 58 | | 59 | | 60 | | 61 | | 62 | | 63 | | 64 | | 65 |
| | 66 | | 67 | | 68 | | 69 | | 70 | | 71 | | 72 | | 73 | | 74 | | 75 | | 76 | | 77 |
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A001477 as a square array
0 | 1 | 3 | 6 | 10 | 15 | 21 | 28 | 36 | 45 | 55 | 66
| 2 | 4 | 7 | 11 | 16 | 22 | 29 | 37 | 46 | 56 | 67
| 5 | 8 | 12 | 17 | 23 | 30 | 38 | 47 | 57 | 68
| 9 | 13 | 18 | 24 | 31 | 39 | 48 | 58 | 69
| 14 | 19 | 25 | 32 | 40 | 49 | 59 | 70
| 20 | 26 | 33 | 41 | 50 | 60 | 71
| 27 | 34 | 42 | 51 | 61 | 72
| 35 | 43 | 52 | 62 | 73
| 44 | 53 | 63 | 74
| 54 | 64 | 75
| 65 | 76
| 77
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A001477 as an upper right triangle
0 | 1 | 3 | 6 | 10 | 15 | 21 | 28 | 36 | 45 | 55 | 66
| | 2 | 4 | 7 | 11 | 16 | 22 | 29 | 37 | 46 | 56 | 67
| | | 5 | 8 | 12 | 17 | 23 | 30 | 38 | 47 | 57 | 68
| | | | 9 | 13 | 18 | 24 | 31 | 39 | 48 | 58 | 69
| | | | | 14 | 19 | 25 | 32 | 40 | 49 | 59 | 70
| | | | | | 20 | 26 | 33 | 41 | 50 | 60 | 71
| | | | | | | 27 | 34 | 42 | 51 | 61 | 72
| | | | | | | | 35 | 43 | 52 | 62 | 73
| | | | | | | | | 44 | 53 | 63 | 74
| | | | | | | | | | 54 | 64 | 75
| | | | | | | | | | | 65 | 76
| | | | | | | | | | | | 77
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