A287151 - OEIS

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A287151 as a triangular array

										1
									3		3
								6		13		6
							10		40		40		10
						15		108		218		108		15
					21		275		1126		1126		275		21
				28		681		5726		11506		5726		681		28
			36		1664		28992		116166		116166		28992		1664		36
		45		4040		146642		1168586		2301877		1168586		146642		4040		45
	55		9779		741556		11749134		45280509		45280509		11749134		741556		9779		55

A287151 as a square array

1	3	6	10	15	21	28	36	45	55
3	13	40	108	275	681	1664	4040	9779
6	40	218	1126	5726	28992	146642	741556
10	108	1126	11506	116166	1168586	11749134
15	275	5726	116166	2301877	45280509
21	681	28992	1168586	45280509
28	1664	146642	11749134
36	4040	741556
45	9779
55

A287151 as an upper right triangle

1	3	6	10	15	21	28	36	45	55
	3	13	40	108	275	681	1664	4040	9779
		6	40	218	1126	5726	28992	146642	741556
			10	108	1126	11506	116166	1168586	11749134
				15	275	5726	116166	2301877	45280509
					21	681	28992	1168586	45280509
						28	1664	146642	11749134
							36	4040	741556
								45	9779
									55