A190909 - OEIS

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A190909 as a triangular array

1

1 1

1 3 2

1 6 10 6

1 10 30 42 6

1 15 70 168 54 30

1 21 140 504 270 330 20

1 28 252 1260 990 1980 260 140

1 36 420 2772 2970 8580 1820 2100 70

1 45 660 5544 7722 30030 9100 16800 1190 630

A190909 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`1`	`3`	`6`	`10`	`15`	`21`	`28`	`36`	`45`
`2`	`10`	`30`	`70`	`140`	`252`	`420`	`660`
`6`	`42`	`168`	`504`	`1260`	`2772`	`5544`
`6`	`54`	`270`	`990`	`2970`	`7722`
`30`	`330`	`1980`	`8580`	`30030`
`20`	`260`	`1820`	`9100`
`140`	`2100`	`16800`
`70`	`1190`
`630`

A190909 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`1`	`3`	`6`	`10`	`15`	`21`	`28`	`36`	`45`
		`2`	`10`	`30`	`70`	`140`	`252`	`420`	`660`
			`6`	`42`	`168`	`504`	`1260`	`2772`	`5544`
				`6`	`54`	`270`	`990`	`2970`	`7722`
					`30`	`330`	`1980`	`8580`	`30030`
						`20`	`260`	`1820`	`9100`
							`140`	`2100`	`16800`
								`70`	`1190`
									`630`

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Last modified September 19 14:43 EDT 2024. Contains 376013 sequences. (Running on oeis4.)