A138948 - OEIS

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A138948 as a triangular array

														2
													1		1
												3		0		0
											0		2		0		0
										1		0		1		0		0
									2		1		0		0		0		0
								1		0		0		1		0		0		0
							0		1		1		0		0		0		0		0
						4		0		0		0		0		0		0		0		0
					1		2		0		0		0		0		0		0		0		0
				2		0		1		0		0		0		0		0		0		0		0
			0		1		0		1		0		0		0		0		0		0		0		0
		1		0		0		0		1		0		0		0		0		0		0		0		0
	3		1		0		0		0		0		0		0		0		0		0		0		0		0

A138948 as a square array

2	1	3	0	1	2	1	0	4	1	2	0	1	3
1	0	2	0	1	0	1	0	2	0	1	0	1
0	0	1	0	0	1	0	0	1	0	0	0
0	0	0	1	0	0	0	0	1	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	0	0	0	0
0	0	0	0	0	0	0
0	0	0	0	0	0
0	0	0	0	0
0	0	0	0
0	0	0
0	0
0

A138948 as an upper right triangle

2	1	3	0	1	2	1	0	4	1	2	0	1	3
	1	0	2	0	1	0	1	0	2	0	1	0	1
		0	0	1	0	0	1	0	0	1	0	0	0
			0	0	0	1	0	0	0	0	1	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	0	0	0	0
							0	0	0	0	0	0	0
								0	0	0	0	0	0
									0	0	0	0	0
										0	0	0	0
											0	0	0
												0	0
													0