A209490 - OEIS

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A209490 as a triangular array

										1
									0		3
								0		0		8
							0		0		4		20
						0		0		0		15		47
					0		0		0		0		37		107
				0		0		0		0		16		87		238
			0		0		0		0		0		60		200		520
		0		0		0		0		0		0		169		448		1121
	0		0		0		0		0		0		64		387		992		2391
0		0		0		0		0		0		0		240		865		2160		5056

A209490 as a square array

1	0	0	0	0	0	0	0	0	0	0
3	0	0	0	0	0	0	0	0	0
8	4	0	0	0	0	0	0	0
20	15	0	0	0	0	0	0
47	37	16	0	0	0	0
107	87	60	0	0	0
238	200	169	64	0
520	448	387	240
1121	992	865
2391	2160
5056

A209490 as an upper right triangle

1	0	0	0	0	0	0	0	0	0	0
	3	0	0	0	0	0	0	0	0	0
		8	4	0	0	0	0	0	0	0
			20	15	0	0	0	0	0	0
				47	37	16	0	0	0	0
					107	87	60	0	0	0
						238	200	169	64	0
							520	448	387	240
								1121	992	865
									2391	2160
										5056