A047991 - OEIS

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A047991 as a triangular array

1

1 -1

1 1 -2

1 -2 -5 6

1 2 -13 -14 24

1 -3 -23 51 94 -120

1 3 -41 -87 400 444 -720

1 -4 -62 200 1009 -2356 -3828 5040

1 4 -94 -296 2609 5716 -22676 -25584 40320

1 -5 -130 550 5273 -17765 -74120 178500 270576 -362880

A047991 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`-1`	`1`	`-2`	`2`	`-3`	`3`	`-4`	`4`	`-5`
`-2`	`-5`	`-13`	`-23`	`-41`	`-62`	`-94`	`-130`
`6`	`-14`	`51`	`-87`	`200`	`-296`	`550`
`24`	`94`	`400`	`1009`	`2609`	`5273`
`-120`	`444`	`-2356`	`5716`	`-17765`
`-720`	`-3828`	`-22676`	`-74120`
`5040`	`-25584`	`178500`
`40320`	`270576`
`-362880`

A047991 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`-1`	`1`	`-2`	`2`	`-3`	`3`	`-4`	`4`	`-5`
		`-2`	`-5`	`-13`	`-23`	`-41`	`-62`	`-94`	`-130`
			`6`	`-14`	`51`	`-87`	`200`	`-296`	`550`
				`24`	`94`	`400`	`1009`	`2609`	`5273`
					`-120`	`444`	`-2356`	`5716`	`-17765`
						`-720`	`-3828`	`-22676`	`-74120`
							`5040`	`-25584`	`178500`
								`40320`	`270576`
									`-362880`

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Last modified May 12 23:14 EDT 2024. Contains 372497 sequences. (Running on oeis4.)