A207981 - OEIS

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A207981 as a triangular array

1

2 2

5 7 5

15 67 67 15

52 1080 4192 1080 52

203 25287 587208 587208 25287 203

877 794545 147512732 953124784 147512732 794545 877

4140 31858034 58668937932 3410310590912 3410310590912 58668937932 31858034

A207981 as a square array

`1`	`2`	`5`	`15`	`52`	`203`	`877`	`4140`
`2`	`7`	`67`	`1080`	`25287`	`794545`	`31858034`
`5`	`67`	`4192`	`587208`	`147512732`	`58668937932`
`15`	`1080`	`587208`	`953124784`	`3410310590912`
`52`	`25287`	`147512732`	`3410310590912`
`203`	`794545`	`58668937932`
`877`	`31858034`

A207981 as an upper right triangle

`1`	`2`	`5`	`15`	`52`	`203`	`877`	`4140`
	`2`	`7`	`67`	`1080`	`25287`	`794545`	`31858034`
		`5`	`67`	`4192`	`587208`	`147512732`	`58668937932`
			`15`	`1080`	`587208`	`953124784`	`3410310590912`
				`52`	`25287`	`147512732`	`3410310590912`
					`203`	`794545`	`58668937932`
						`877`	`31858034`

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Last modified September 9 05:59 EDT 2024. Contains 375759 sequences. (Running on oeis4.)