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A021012 as a triangular array

1

1 -1

2 -4 2

6 -18 18 -6

24 -96 144 -96 24

120 -600 1200 -1200 600 -120

720 -4320 10800 -14400 10800 -4320 720

5040 -35280 105840 -176400 176400 -105840 35280 -5040

40320 -322560 1128960 -2257920 2822400 -2257920 1128960 -322560 40320

362880 -3265920

A021012 as a square array

`1`	`1`	`2`	`6`	`24`	`120`	`720`	`5040`	`40320`	`362880`
`-1`	`-4`	`-18`	`-96`	`-600`	`-4320`	`-35280`	`-322560`	`-3265920`
`2`	`18`	`144`	`1200`	`10800`	`105840`	`1128960`
`-6`	`-96`	`-1200`	`-14400`	`-176400`	`-2257920`
`24`	`600`	`10800`	`176400`	`2822400`
`-120`	`-4320`	`-105840`	`-2257920`
`720`	`35280`	`1128960`
`-5040`	`-322560`
`40320`

A021012 as an upper right triangle

`1`	`1`	`2`	`6`	`24`	`120`	`720`	`5040`	`40320`	`362880`
	`-1`	`-4`	`-18`	`-96`	`-600`	`-4320`	`-35280`	`-322560`	`-3265920`
		`2`	`18`	`144`	`1200`	`10800`	`105840`	`1128960`
			`-6`	`-96`	`-1200`	`-14400`	`-176400`	`-2257920`
				`24`	`600`	`10800`	`176400`	`2822400`
					`-120`	`-4320`	`-105840`	`-2257920`
						`720`	`35280`	`1128960`
							`-5040`	`-322560`
								`40320`

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Last modified August 6 02:18 EDT 2024. Contains 374957 sequences. (Running on oeis4.)