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A253666 as a triangular array

1

1 1

2 4 2

6 18 18 6

6 24 36 24 6

30 150 300 300 150 30

20 120 300 400 300 120 20

140 980 2940 4900 4900 2940 980 140

70 560 1960 3920 4900 3920 1960 560 70

630 5670 22680 52920 79380 79380 52920 22680 5670 630

A253666 as a square array

`1`	`1`	`2`	`6`	`6`	`30`	`20`	`140`	`70`	`630`
`1`	`4`	`18`	`24`	`150`	`120`	`980`	`560`	`5670`
`2`	`18`	`36`	`300`	`300`	`2940`	`1960`	`22680`
`6`	`24`	`300`	`400`	`4900`	`3920`	`52920`
`6`	`150`	`300`	`4900`	`4900`	`79380`
`30`	`120`	`2940`	`3920`	`79380`
`20`	`980`	`1960`	`52920`
`140`	`560`	`22680`
`70`	`5670`
`630`

A253666 as an upper right triangle

`1`	`1`	`2`	`6`	`6`	`30`	`20`	`140`	`70`	`630`
	`1`	`4`	`18`	`24`	`150`	`120`	`980`	`560`	`5670`
		`2`	`18`	`36`	`300`	`300`	`2940`	`1960`	`22680`
			`6`	`24`	`300`	`400`	`4900`	`3920`	`52920`
				`6`	`150`	`300`	`4900`	`4900`	`79380`
					`30`	`120`	`2940`	`3920`	`79380`
						`20`	`980`	`1960`	`52920`
							`140`	`560`	`22680`
								`70`	`5670`
									`630`

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Last modified August 6 03:16 EDT 2024. Contains 374957 sequences. (Running on oeis4.)