A188448 - OEIS

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A188448 as a triangular array

											1
										2		0
									4		1		0
								10		4		0		0
							26		18		1		0		0
						76		112		10		0		0		0
					232		820		112		1		0		0		0
				764		6912		1760		26		0		0		0		0
			2620		66178		35150		820		1		0		0		0		0
		9496		708256		848932		35150		76		0		0		0		0		0
	35696		8372754		24243520		1944530		6912		1		0		0		0		0

A188448 as a square array

1	2	4	10	26	76	232	764	2620	9496	35696
0	1	4	18	112	820	6912	66178	708256	8372754
0	0	1	10	112	1760	35150	848932	24243520
0	0	0	1	26	820	35150	1944530
0	0	0	0	1	76	6912
0	0	0	0	0	1
0	0	0	0	0
0	0	0	0
0	0	0
0	0

A188448 as an upper right triangle

1	2	4	10	26	76	232	764	2620	9496	35696
	0	1	4	18	112	820	6912	66178	708256	8372754
		0	0	1	10	112	1760	35150	848932	24243520
			0	0	0	1	26	820	35150	1944530
				0	0	0	0	1	76	6912
					0	0	0	0	0	1
						0	0	0	0	0
							0	0	0	0
								0	0	0
									0	0