A274390 - OEIS

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A274390 as a triangular array

														1
													1		0
												1		2		0
											1		4		9		0
										1		6		30		64		0
									1		8		63		332		625		0
								1		10		108		948		4880		7776		0
							1		12		165		2056		18645		89742		117649		0
						1		14		234		3800		50680		454158		1986124		2097152		0
					1		16		315		6324		112625		1537524		13221075		51471800		43046721		0
				1		18		408		9772		219000		4090980		55494712		448434136		1530489744		1000000000		0
			1		20		513		14288		387205		9266706		176238685		2325685632		17386204761		51395228090		25937424601		0
		1		22		630		20016		637520		18704322		463975764		8793850560		111107380464		759123121050		1924687118684		743008370688		0
	1		24		759		27100		993105		34617288		1067280319		26858490392		499217336145		5964692819140		36882981687519		79553145323940		23298085122481		0

A274390 as a square array

1	1	1	1	1	1	1	1	1	1	1	1	1	1
0	2	4	6	8	10	12	14	16	18	20	22	24
0	9	30	63	108	165	234	315	408	513	630	759
0	64	332	948	2056	3800	6324	9772	14288	20016	27100
0	625	4880	18645	50680	112625	219000	387205	637520	993105
0	7776	89742	454158	1537524	4090980	9266706	18704322	34617288
0	117649	1986124	13221075	55494712	176238685	463975764	1067280319
0	2097152	51471800	448434136	2325685632	8793850560	26858490392
0	43046721	1530489744	17386204761	111107380464	499217336145
0	1000000000	51395228090	759123121050	5964692819140
0	25937424601	1924687118684	36882981687519
0	743008370688	79553145323940
0	23298085122481
0

A274390 as an upper right triangle

1	1	1	1	1	1	1	1	1	1	1	1	1	1
	0	2	4	6	8	10	12	14	16	18	20	22	24
		0	9	30	63	108	165	234	315	408	513	630	759
			0	64	332	948	2056	3800	6324	9772	14288	20016	27100
				0	625	4880	18645	50680	112625	219000	387205	637520	993105
					0	7776	89742	454158	1537524	4090980	9266706	18704322	34617288
						0	117649	1986124	13221075	55494712	176238685	463975764	1067280319
							0	2097152	51471800	448434136	2325685632	8793850560	26858490392
								0	43046721	1530489744	17386204761	111107380464	499217336145
									0	1000000000	51395228090	759123121050	5964692819140
										0	25937424601	1924687118684	36882981687519
											0	743008370688	79553145323940
												0	23298085122481
													0