A139801 - OEIS

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A139801 as a triangular array

1

2 2

2 3 3

3 6 9 9

3 6 10 14 14

4 10 20 34 48 48

4 10 20 35 55 75 75

5 15 35 70 125 200 275 275

5 15 35 70 126 209 319 429 429

6 21 56 126 252 461 780 1209 1638 1638

A139801 as a square array

`1`	`2`	`2`	`3`	`3`	`4`	`4`	`5`	`5`	`6`
`2`	`3`	`6`	`6`	`10`	`10`	`15`	`15`	`21`
`3`	`9`	`10`	`20`	`20`	`35`	`35`	`56`
`9`	`14`	`34`	`35`	`70`	`70`	`126`
`14`	`48`	`55`	`125`	`126`	`252`
`48`	`75`	`200`	`209`	`461`
`75`	`275`	`319`	`780`
`275`	`429`	`1209`
`429`	`1638`
`1638`

A139801 as an upper right triangle

`1`	`2`	`2`	`3`	`3`	`4`	`4`	`5`	`5`	`6`
	`2`	`3`	`6`	`6`	`10`	`10`	`15`	`15`	`21`
		`3`	`9`	`10`	`20`	`20`	`35`	`35`	`56`
			`9`	`14`	`34`	`35`	`70`	`70`	`126`
				`14`	`48`	`55`	`125`	`126`	`252`
					`48`	`75`	`200`	`209`	`461`
						`75`	`275`	`319`	`780`
							`275`	`429`	`1209`
								`429`	`1638`
									`1638`

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Last modified April 24 18:17 EDT 2024. Contains 371962 sequences. (Running on oeis4.)