A281251 - OEIS

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A281251 as a triangular array

									0
								0		0
							0		0		0
						1		12		12		1
					2		139		443		139		2
				9		1222		8489		8489		1222		9
			34		9151		105368		197429		105368		9151		34
		124		63138		1113148		3291920		3291920		1113148		63138		124
	432		412070		10598099		47427679		76670685		47427679		10598099

A281251 as a square array

0	0	0	1	2	9	34	124	432
0	0	12	139	1222	9151	63138	412070
0	12	443	8489	105368	1113148	10598099
1	139	8489	197429	3291920	47427679
2	1222	105368	3291920	76670685
9	9151	1113148	47427679
34	63138	10598099
124

A281251 as an upper right triangle

0	0	0	1	2	9	34	124	432
	0	0	12	139	1222	9151	63138	412070
		0	12	443	8489	105368	1113148	10598099
			1	139	8489	197429	3291920	47427679
				2	1222	105368	3291920	76670685
					9	9151	1113148	47427679
						34	63138	10598099
							124