A089940 - OEIS

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A089940 as a triangular array

1

1 1

2 1 1

3 4 1 1

6 5 6 1 1

10 15 7 8 1 1

20 21 28 9 10 1 1

35 56 36 45 11 12 1 1

70 84 120 55 66 13 14 1 1

126 210 165 220 78 91 15 16 1 1

252 330 495 286 364 105 120 17 18 1 1

462 792 715 1001 455 560 136 153

A089940 as a square array

`1`	`1`	`2`	`3`	`6`	`10`	`20`	`35`	`70`	`126`	`252`	`462`
`1`	`1`	`4`	`5`	`15`	`21`	`56`	`84`	`210`	`330`	`792`
`1`	`1`	`6`	`7`	`28`	`36`	`120`	`165`	`495`	`715`
`1`	`1`	`8`	`9`	`45`	`55`	`220`	`286`	`1001`
`1`	`1`	`10`	`11`	`66`	`78`	`364`	`455`
`1`	`1`	`12`	`13`	`91`	`105`	`560`
`1`	`1`	`14`	`15`	`120`	`136`
`1`	`1`	`16`	`17`	`153`
`1`	`1`	`18`
`1`	`1`
`1`

A089940 as an upper right triangle

`1`	`1`	`2`	`3`	`6`	`10`	`20`	`35`	`70`	`126`	`252`	`462`
	`1`	`1`	`4`	`5`	`15`	`21`	`56`	`84`	`210`	`330`	`792`
		`1`	`1`	`6`	`7`	`28`	`36`	`120`	`165`	`495`	`715`
			`1`	`1`	`8`	`9`	`45`	`55`	`220`	`286`	`1001`
				`1`	`1`	`10`	`11`	`66`	`78`	`364`	`455`
					`1`	`1`	`12`	`13`	`91`	`105`	`560`
						`1`	`1`	`14`	`15`	`120`	`136`
							`1`	`1`	`16`	`17`	`153`
								`1`	`1`	`18`
									`1`	`1`
										`1`

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)