A274740 - OEIS

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A274740 as a triangular array

												1
											0		1
										0		2		1
									0		9		4		1
								0		64		30		6		1
							0		625		332		63		8		1
						0		7776		4880		948		108		10		1
					0		117649		89742		18645		2056		165		12		1
				0		2097152		1986124		454158		50680		3800		234		14		1
			0		43046721		51471800		13221075		1537524		112625		6324		315		16		1
		0		1000000000		1530489744		448434136		55494712		4090980		219000		9772		408		18		1
	0		25937424601		51395228090		17386204761		2325685632		176238685		9266706		387205		14288		513		20		1

A274740 as a square array

1	0	0	0	0	0	0	0	0	0	0	0
1	2	9	64	625	7776	117649	2097152	43046721	1000000000	25937424601
1	4	30	332	4880	89742	1986124	51471800	1530489744	51395228090
1	6	63	948	18645	454158	13221075	448434136	17386204761
1	8	108	2056	50680	1537524	55494712	2325685632
1	10	165	3800	112625	4090980	176238685
1	12	234	6324	219000	9266706
1	14	315	9772	387205
1	16	408	14288
1	18	513
1	20
1

A274740 as an upper right triangle

1	0	0	0	0	0	0	0	0	0	0	0
	1	2	9	64	625	7776	117649	2097152	43046721	1000000000	25937424601
		1	4	30	332	4880	89742	1986124	51471800	1530489744	51395228090
			1	6	63	948	18645	454158	13221075	448434136	17386204761
				1	8	108	2056	50680	1537524	55494712	2325685632
					1	10	165	3800	112625	4090980	176238685
						1	12	234	6324	219000	9266706
							1	14	315	9772	387205
								1	16	408	14288
									1	18	513
										1	20
											1