A003506 - OEIS

login

The OEIS is supported by the many generous donors to the OEIS Foundation.

A003506 as a triangular array

1

2 2

3 6 3

4 12 12 4

5 20 30 20 5

6 30 60 60 30 6

7 42 105 140 105 42 7

8 56 168 280 280 168 56 8

9 72 252 504 630 504 252 72 9

10 90 360 840 1260 1260 840 360 90 10

11 110 495 1320 2310 2772 2310 1320 495 110 11

A003506 as a square array

`1`	`2`	`3`	`4`	`5`	`6`	`7`	`8`	`9`	`10`	`11`
`2`	`6`	`12`	`20`	`30`	`42`	`56`	`72`	`90`	`110`
`3`	`12`	`30`	`60`	`105`	`168`	`252`	`360`	`495`
`4`	`20`	`60`	`140`	`280`	`504`	`840`	`1320`
`5`	`30`	`105`	`280`	`630`	`1260`	`2310`
`6`	`42`	`168`	`504`	`1260`	`2772`
`7`	`56`	`252`	`840`	`2310`
`8`	`72`	`360`	`1320`
`9`	`90`	`495`
`10`	`110`
`11`

A003506 as an upper right triangle

`1`	`2`	`3`	`4`	`5`	`6`	`7`	`8`	`9`	`10`	`11`
	`2`	`6`	`12`	`20`	`30`	`42`	`56`	`72`	`90`	`110`
		`3`	`12`	`30`	`60`	`105`	`168`	`252`	`360`	`495`
			`4`	`20`	`60`	`140`	`280`	`504`	`840`	`1320`
				`5`	`30`	`105`	`280`	`630`	`1260`	`2310`
					`6`	`42`	`168`	`504`	`1260`	`2772`
						`7`	`56`	`252`	`840`	`2310`
							`8`	`72`	`360`	`1320`
								`9`	`90`	`495`
									`10`	`110`
										`11`

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 25 11:39 EDT 2024. Contains 371969 sequences. (Running on oeis4.)