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A047998 as a triangular array

1

0 1

0 0 1

0 0 1 1

0 0 0 2 1

0 0 0 1 3 1

0 0 0 1 3 4 1

0 0 0 0 3 6 5 1

0 0 0 0 2 7 10 6 1

0 0 0 0 1 7 14 15 7 1

0 0 0 0 1 5 17 25 21 8 1

0 0 0 0 0 5 16 35 41 28 9 1

0 0 0 0 0 3 16 40 65 63 36 10 1

0 0 0 0 0 2 14 43 86 112 92 45 11 1

0 0 0 0 0 1 11 44 102 167 182 129 55 12 1

0 0 0 0 0 1 9 40 115 219 301 282 175 66 13 1

A047998 as a square array

1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

1 0 0 0 0 0 0 0 0 0 0 0 0 0 0

1 1 0 0 0 0 0 0 0 0 0 0 0 0

1 2 1 1 0 0 0 0 0 0 0 0 0

1 3 3 3 2 1 1 0 0 0 0 0

1 4 6 7 7 5 5 3 2 1 1

1 5 10 14 17 16 16 14 11 9

1 6 15 25 35 40 43 44 40

1 7 21 41 65 86 102 115

1 8 28 63 112 167 219

1 9 36 92 182 301

1 10 45 129 282

1 11 55 175

1 12 66

1 13

1

A047998 as an upper right triangle