A047998 - OEIS

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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

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