A360850 - OEIS

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A360850 as a triangular array

										1
									3		3
								6		12		6
							10		33		33		10
						15		72		135		72		15
					21		135		438		438		135		21
				28		228		1140		2224		1140		228		28
			36		357		2511		8850		8850		2511		357		36
		45		528		4893		27480		55725		27480		4893		528		45
	55		747		8700		70462		265665		265665		70462		8700		747		55

A360850 as a square array

1	3	6	10	15	21	28	36	45	55
3	12	33	72	135	228	357	528	747
6	33	135	438	1140	2511	4893	8700
10	72	438	2224	8850	27480	70462
15	135	1140	8850	55725	265665
21	228	2511	27480	265665
28	357	4893	70462
36	528	8700
45	747
55

A360850 as an upper right triangle

1	3	6	10	15	21	28	36	45	55
	3	12	33	72	135	228	357	528	747
		6	33	135	438	1140	2511	4893	8700
			10	72	438	2224	8850	27480	70462
				15	135	1140	8850	55725	265665
					21	228	2511	27480	265665
						28	357	4893	70462
							36	528	8700
								45	747
									55