A257673 - OEIS

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A257673 as a triangular array

											1
										0		1
									0		3		1
								0		6		6		1
							0		13		21		9		1
						0		24		62		45		12		1
					0		48		162		174		78		15		1
				0		86		396		576		376		120		18		1
			0		160		917		1719		1509		695		171		21		1
		0		282		2036		4761		5340		3285		1158		231		24		1
	0		500		4380		12441		17234		13473		6309		1792		300		27		1

A257673 as a square array

1	0	0	0	0	0	0	0	0	0	0
1	3	6	13	24	48	86	160	282	500
1	6	21	62	162	396	917	2036	4380
1	9	45	174	576	1719	4761	12441
1	12	78	376	1509	5340	17234
1	15	120	695	3285	13473
1	18	171	1158	6309
1	21	231	1792
1	24	300
1	27
1

A257673 as an upper right triangle

1	0	0	0	0	0	0	0	0	0	0
	1	3	6	13	24	48	86	160	282	500
		1	6	21	62	162	396	917	2036	4380
			1	9	45	174	576	1719	4761	12441
				1	12	78	376	1509	5340	17234
					1	15	120	695	3285	13473
						1	18	171	1158	6309
							1	21	231	1792
								1	24	300
									1	27
										1