A280580 - OEIS

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A280580 as a triangular array

1

1 1

2 6 1

5 30 15 1

14 140 140 28 1

42 630 1050 420 45 1

132 2772 6930 4620 990 66 1

429 12012 42042 42042 15015 2002 91 1

1430 51480 240240 336336 180180 40040 3640 120 1

4862 218790 1312740 2450448 1837836 612612 92820 6120 153 1

A280580 as a square array

`1`	`1`	`2`	`5`	`14`	`42`	`132`	`429`	`1430`	`4862`
`1`	`6`	`30`	`140`	`630`	`2772`	`12012`	`51480`	`218790`
`1`	`15`	`140`	`1050`	`6930`	`42042`	`240240`	`1312740`
`1`	`28`	`420`	`4620`	`42042`	`336336`	`2450448`
`1`	`45`	`990`	`15015`	`180180`	`1837836`
`1`	`66`	`2002`	`40040`	`612612`
`1`	`91`	`3640`	`92820`
`1`	`120`	`6120`
`1`	`153`
`1`

A280580 as an upper right triangle

`1`	`1`	`2`	`5`	`14`	`42`	`132`	`429`	`1430`	`4862`
	`1`	`6`	`30`	`140`	`630`	`2772`	`12012`	`51480`	`218790`
		`1`	`15`	`140`	`1050`	`6930`	`42042`	`240240`	`1312740`
			`1`	`28`	`420`	`4620`	`42042`	`336336`	`2450448`
				`1`	`45`	`990`	`15015`	`180180`	`1837836`
					`1`	`66`	`2002`	`40040`	`612612`
						`1`	`91`	`3640`	`92820`
							`1`	`120`	`6120`
								`1`	`153`
									`1`

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Last modified April 19 18:58 EDT 2024. Contains 371798 sequences. (Running on oeis4.)