A013621 - OEIS

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A013621 as a triangular array

									1
								2		5
							4		20		25
						8		60		150		125
					16		160		600		1000		625
				32		400		2000		5000		6250		3125
			64		960		6000		20000		37500		37500		15625
		128		2240		16800		70000		175000		262500		218750		78125
	256		5120		44800		224000		700000		1400000

A013621 as a square array

1	2	4	8	16	32	64	128	256
5	20	60	160	400	960	2240	5120
25	150	600	2000	6000	16800	44800
125	1000	5000	20000	70000	224000
625	6250	37500	175000	700000
3125	37500	262500	1400000
15625	218750
78125

A013621 as an upper right triangle

1	2	4	8	16	32	64	128	256
	5	20	60	160	400	960	2240	5120
		25	150	600	2000	6000	16800	44800
			125	1000	5000	20000	70000	224000
				625	6250	37500	175000	700000
					3125	37500	262500	1400000
						15625	218750
							78125