A207221 - OEIS

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A207221 as a triangular array

3

9 9

25 81 25

69 625 625 69

191 4761 12534 4761 191

529 36481 247163 247163 36481 529

1465 279841 4916282 12584703 4916282 279841 1465

4057 2146225 97935886 647820815 647820815 97935886 2146225 4057

11235

A207221 as a square array

`3`	`9`	`25`	`69`	`191`	`529`	`1465`	`4057`	`11235`
`9`	`81`	`625`	`4761`	`36481`	`279841`	`2146225`
`25`	`625`	`12534`	`247163`	`4916282`	`97935886`
`69`	`4761`	`247163`	`12584703`	`647820815`
`191`	`36481`	`4916282`	`647820815`
`529`	`279841`	`97935886`
`1465`	`2146225`
`4057`

A207221 as an upper right triangle

`3`	`9`	`25`	`69`	`191`	`529`	`1465`	`4057`	`11235`
	`9`	`81`	`625`	`4761`	`36481`	`279841`	`2146225`
		`25`	`625`	`12534`	`247163`	`4916282`	`97935886`
			`69`	`4761`	`247163`	`12584703`	`647820815`
				`191`	`36481`	`4916282`	`647820815`
					`529`	`279841`	`97935886`
						`1465`	`2146225`
							`4057`

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Last modified September 8 20:40 EDT 2024. Contains 375759 sequences. (Running on oeis4.)