A223520 - OEIS

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A223520 as a triangular array

1

18 1

630 54 1

32760 3492 108 1

2260440 277200 11160 180 1

194397840 26376840 1259280 27180 270 1

20022977520 2937589200 158601240 4140360 56070 378 1

2402757302400 375471270720 22286940480 667865520 11093040 103320 504 1

A223520 as a square array

`1`	`18`	`630`	`32760`	`2260440`	`194397840`	`20022977520`	`2402757302400`
`1`	`54`	`3492`	`277200`	`26376840`	`2937589200`	`375471270720`
`1`	`108`	`11160`	`1259280`	`158601240`	`22286940480`
`1`	`180`	`27180`	`4140360`	`667865520`
`1`	`270`	`56070`	`11093040`
`1`	`378`	`103320`
`1`	`504`
`1`

A223520 as an upper right triangle

`1`	`18`	`630`	`32760`	`2260440`	`194397840`	`20022977520`	`2402757302400`
	`1`	`54`	`3492`	`277200`	`26376840`	`2937589200`	`375471270720`
		`1`	`108`	`11160`	`1259280`	`158601240`	`22286940480`
			`1`	`180`	`27180`	`4140360`	`667865520`
				`1`	`270`	`56070`	`11093040`
					`1`	`378`	`103320`
						`1`	`504`
							`1`

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Last modified May 16 20:35 EDT 2024. Contains 372555 sequences. (Running on oeis4.)