A296419 - OEIS

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A296419 as a triangular array

									1
								1		4
							1		10		50
						1		20		175		980
					1		35		490		4116		24696
				1		56		1176		14112		116424		731808
			1		84		2520		41580		457380		3737448		24293412
		1		120		4950		108900		1557270		16195608		131589315		877262100
	1		165		9075		259545		4723719		61408347		614083470		4971151900		33803832920

A296419 as a square array

1	1	1	1	1	1	1	1	1
4	10	20	35	56	84	120	165
50	175	490	1176	2520	4950	9075
980	4116	14112	41580	108900	259545
24696	116424	457380	1557270	4723719
731808	3737448	16195608	61408347
24293412	131589315	614083470
877262100	4971151900
33803832920

A296419 as an upper right triangle

1	1	1	1	1	1	1	1	1
	4	10	20	35	56	84	120	165
		50	175	490	1176	2520	4950	9075
			980	4116	14112	41580	108900	259545
				24696	116424	457380	1557270	4723719
					731808	3737448	16195608	61408347
						24293412	131589315	614083470
							877262100	4971151900
								33803832920