A198253 - OEIS

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A198253 as a triangular array

									1
								1		1
							2		5		2
						5		40		40		5
					15		485		1675		485		15
				51		6528		81440		81440		6528		51
			187		90641		4059950		14520192		4059950		90641		187
		715		1268648		203087097		2606019472		2606019472		203087097		1268648		715
	2795		17794141		10164141586

A198253 as a square array

1	1	2	5	15	51	187	715	2795
1	5	40	485	6528	90641	1268648	17794141
2	40	1675	81440	4059950	203087097	10164141586
5	485	81440	14520192	2606019472
15	6528	4059950	2606019472
51	90641	203087097
187	1268648
715

A198253 as an upper right triangle

1	1	2	5	15	51	187	715	2795
	1	5	40	485	6528	90641	1268648	17794141
		2	40	1675	81440	4059950	203087097	10164141586
			5	485	81440	14520192	2606019472
				15	6528	4059950	2606019472
					51	90641	203087097
						187	1268648
							715