A213503 - OEIS

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A213503 as a triangular array

										1
									6		2
								20		11		3
							50		34		16		4
						105		80		48		21		5
					196		160		110		62		26		6
				336		287		215		140		76		31		7
			540		476		378		270		170		90		36		8
		825		744		616		469		325		200		104		41		9
	1210		1110		948		756		560		380		230		118		46		10

A213503 as a square array

1	6	20	50	105	196	336	540	825	1210
2	11	34	80	160	287	476	744	1110
3	16	48	110	215	378	616	948
4	21	62	140	270	469	756
5	26	76	170	325	560
6	31	90	200	380
7	36	104	230
8	41	118
9	46
10

A213503 as an upper right triangle

1	6	20	50	105	196	336	540	825	1210
	2	11	34	80	160	287	476	744	1110
		3	16	48	110	215	378	616	948
			4	21	62	140	270	469	756
				5	26	76	170	325	560
					6	31	90	200	380
						7	36	104	230
							8	41	118
								9	46
									10