A223515 - OEIS

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A223515 as a triangular array

									1
								13		1
							325		39		1
						12025		1807		78		1
					589225		102375		5785		130		1
				35942725		6936475		466830		14105		195		1
			2623818925		549241875		41948725		1538810		29120		273		1
		223024608625		49858620175		4198780950		177364005		4130490		53690		364		1
	21633387036625

A223515 as a square array

1	13	325	12025	589225	35942725	2623818925	223024608625	21633387036625
1	39	1807	102375	6936475	549241875	49858620175
1	78	5785	466830	41948725	4198780950
1	130	14105	1538810	177364005
1	195	29120	4130490
1	273	53690
1	364
1

A223515 as an upper right triangle

1	13	325	12025	589225	35942725	2623818925	223024608625	21633387036625
	1	39	1807	102375	6936475	549241875	49858620175
		1	78	5785	466830	41948725	4198780950
			1	130	14105	1538810	177364005
				1	195	29120	4130490
					1	273	53690
						1	364
							1