A051237 - OEIS

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A051237 as a triangular array

														1
													1		2
												1		2		3
											1		2		3		4
										1		4		3		2		5
									1		4		3		2		5		6
								1		4		3		2		5		6		7
							1		2		3		4		7		6		5		8
						1		2		3		4		7		6		5		8		9
					1		2		3		4		7		6		5		8		9		10
				1		2		3		4		7		10		9		8		5		6		11
			1		2		3		4		7		10		9		8		5		6		11		12
		1		2		3		4		7		6		5		12		11		8		9		10		13
	1		2		3		4		7		6		13		10

A051237 as a square array

1	1	1	1	1	1	1	1	1	1	1	1	1	1
2	2	2	4	4	4	2	2	2	2	2	2	2
3	3	3	3	3	3	3	3	3	3	3	3
4	2	2	2	4	4	4	4	4	4	4
5	5	5	7	7	7	7	7	7	7
6	6	6	6	6	10	10	6	6
7	5	5	5	9	9	5	13
8	8	8	8	8	12	10
9	9	5	5	11
10	6	6	8
11	11	9
12	10
13

A051237 as an upper right triangle

1	1	1	1	1	1	1	1	1	1	1	1	1	1
	2	2	2	4	4	4	2	2	2	2	2	2	2
		3	3	3	3	3	3	3	3	3	3	3	3
			4	2	2	2	4	4	4	4	4	4	4
				5	5	5	7	7	7	7	7	7	7
					6	6	6	6	6	10	10	6	6
						7	5	5	5	9	9	5	13
							8	8	8	8	8	12	10
								9	9	5	5	11
									10	6	6	8
										11	11	9
											12	10
												13