A145890 - OEIS

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A145890 as a triangular array

1

1 2

2 2 6

5 4 6 20

14 10 12 20 70

42 28 30 40 70 252

132 84 84 100 140 252 924

429 264 252 280 350 504 924 3432

1430 858 792 840 980 1260 1848 3432 12870

4862 2860 2574 2640 2940 3528 4620 6864 12870 48620

A145890 as a square array

`1`	`1`	`2`	`5`	`14`	`42`	`132`	`429`	`1430`	`4862`
`2`	`2`	`4`	`10`	`28`	`84`	`264`	`858`	`2860`
`6`	`6`	`12`	`30`	`84`	`252`	`792`	`2574`
`20`	`20`	`40`	`100`	`280`	`840`	`2640`
`70`	`70`	`140`	`350`	`980`	`2940`
`252`	`252`	`504`	`1260`	`3528`
`924`	`924`	`1848`	`4620`
`3432`	`3432`	`6864`
`12870`	`12870`
`48620`

A145890 as an upper right triangle

`1`	`1`	`2`	`5`	`14`	`42`	`132`	`429`	`1430`	`4862`
	`2`	`2`	`4`	`10`	`28`	`84`	`264`	`858`	`2860`
		`6`	`6`	`12`	`30`	`84`	`252`	`792`	`2574`
			`20`	`20`	`40`	`100`	`280`	`840`	`2640`
				`70`	`70`	`140`	`350`	`980`	`2940`
					`252`	`252`	`504`	`1260`	`3528`
						`924`	`924`	`1848`	`4620`
							`3432`	`3432`	`6864`
								`12870`	`12870`
									`48620`

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Last modified August 24 14:47 EDT 2024. Contains 375417 sequences. (Running on oeis4.)