A140821 - OEIS

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A140821 as a triangular array

2

2 4

2 4 6

6 6 6 8

8 12 8 8 10

10 20 20 10 10 12

12 60 60 60 12 12 14

14 42 70 70 42 14 14 16

16 112 112 280 112 112 16 16 18

18 72 504 252 252 504 72 18 18

A140821 as a square array

`2`	`2`	`2`	`6`	`8`	`10`	`12`	`14`	`16`	`18`
`4`	`4`	`6`	`12`	`20`	`60`	`42`	`112`	`72`
`6`	`6`	`8`	`20`	`60`	`70`	`112`	`504`
`8`	`8`	`10`	`60`	`70`	`280`	`252`
`10`	`10`	`12`	`42`	`112`	`252`
`12`	`12`	`14`	`112`	`504`
`14`	`14`	`16`	`72`
`16`	`16`	`18`
`18`	`18`

A140821 as an upper right triangle

`2`	`2`	`2`	`6`	`8`	`10`	`12`	`14`	`16`	`18`
	`4`	`4`	`6`	`12`	`20`	`60`	`42`	`112`	`72`
		`6`	`6`	`8`	`20`	`60`	`70`	`112`	`504`
			`8`	`8`	`10`	`60`	`70`	`280`	`252`
				`10`	`10`	`12`	`42`	`112`	`252`
					`12`	`12`	`14`	`112`	`504`
						`14`	`14`	`16`	`72`
							`16`	`16`	`18`
								`18`	`18`

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Last modified April 25 10:01 EDT 2024. Contains 371967 sequences. (Running on oeis4.)