A074586 - OEIS

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A074586 as a triangular array

												1
											1		2
										1		4		2
									1		7		8		2
								1		9		15		10		2
							1		13		30		27		12		2
						1		15		43		57		39		14		2
					1		19		67		108		98		53		16		2
				1		22		90		177		206		151		69		18		2
			1		26		123		282		393		359		220		87		20		2
		1		28		149		405		675		752		579		307		107		22		2
	1		34		203		594		1109

A074586 as a square array

1	1	1	1	1	1	1	1	1	1	1	1
2	4	7	9	13	15	19	22	26	28	34
2	8	15	30	43	67	90	123	149	203
2	10	27	57	108	177	282	405	594
2	12	39	98	206	393	675	1109
2	14	53	151	359	752
2	16	69	220	579
2	18	87	307
2	20	107
2	22
2

A074586 as an upper right triangle

1	1	1	1	1	1	1	1	1	1	1	1
	2	4	7	9	13	15	19	22	26	28	34
		2	8	15	30	43	67	90	123	149	203
			2	10	27	57	108	177	282	405	594
				2	12	39	98	206	393	675	1109
					2	14	53	151	359	752
						2	16	69	220	579
							2	18	87	307
								2	20	107
									2	22
										2