A143987 - OEIS

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A143987 as a triangular array

1

-1 1

1 2 0

-1 3 0 -1

1 -4 0 4 1

-1 5 0 -10 -5 2

1 -6 0 20 15 -12 -9

-1 7 0 -35 -35 42 63 9

1 -8 0 56 70 -112 -252 -72 50

-1 9 0 -84 -126 252 756 324 -450 -267

1 -10 0 120 210 -504 -1890 -1080 2250 2670 413

A143987 as a square array

`1`	`-1`	`1`	`-1`	`1`	`-1`	`1`	`-1`	`1`	`-1`	`1`
`1`	`2`	`3`	`-4`	`5`	`-6`	`7`	`-8`	`9`	`-10`
`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`
`-1`	`4`	`-10`	`20`	`-35`	`56`	`-84`	`120`
`1`	`-5`	`15`	`-35`	`70`	`-126`	`210`
`2`	`-12`	`42`	`-112`	`252`	`-504`
`-9`	`63`	`-252`	`756`	`-1890`
`9`	`-72`	`324`	`-1080`
`50`	`-450`	`2250`
`-267`	`2670`
`413`

A143987 as an upper right triangle

`1`	`-1`	`1`	`-1`	`1`	`-1`	`1`	`-1`	`1`	`-1`	`1`
	`1`	`2`	`3`	`-4`	`5`	`-6`	`7`	`-8`	`9`	`-10`
		`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`
			`-1`	`4`	`-10`	`20`	`-35`	`56`	`-84`	`120`
				`1`	`-5`	`15`	`-35`	`70`	`-126`	`210`
					`2`	`-12`	`42`	`-112`	`252`	`-504`
						`-9`	`63`	`-252`	`756`	`-1890`
							`9`	`-72`	`324`	`-1080`
								`50`	`-450`	`2250`
									`-267`	`2670`
										`413`

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)