A143956 - OEIS

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A143956 as a triangular array

											1
										3		2
									5		4		2
								7		6		4		2
							9		8		6		4		2
						11		10		8		6		4		2
					13		12		10		8		6		4		2
				15		14		12		10		8		6		4		2
			17		16		14		12		10		8		6		4		2
		19		18		16		14		12		10		8		6		4		2
	21		20		18		16		14		12		10		8		6		4		2

A143956 as a square array

1	3	5	7	9	11	13	15	17	19	21
2	4	6	8	10	12	14	16	18	20
2	4	6	8	10	12	14	16	18
2	4	6	8	10	12	14	16
2	4	6	8	10	12	14
2	4	6	8	10	12
2	4	6	8	10
2	4	6	8
2	4	6
2	4
2

A143956 as an upper right triangle

1	3	5	7	9	11	13	15	17	19	21
	2	4	6	8	10	12	14	16	18	20
		2	4	6	8	10	12	14	16	18
			2	4	6	8	10	12	14	16
				2	4	6	8	10	12	14
					2	4	6	8	10	12
						2	4	6	8	10
							2	4	6	8
								2	4	6
									2	4
										2