A131108 - OEIS

login

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

A131108 as a triangular array

1

1 1

2 3 1

2 6 5 1

2 8 12 7 1

2 10 20 20 9 1

2 12 30 40 30 11 1

2 14 42 70 70 42 13 1

2 16 56 112 140 112 56 15 1

2 18 72 168 252 252 168 72 17 1

2 20 90 240 420 504 420 240 90 19 1

A131108 as a square array

`1`	`1`	`2`	`2`	`2`	`2`	`2`	`2`	`2`	`2`	`2`
`1`	`3`	`6`	`8`	`10`	`12`	`14`	`16`	`18`	`20`
`1`	`5`	`12`	`20`	`30`	`42`	`56`	`72`	`90`
`1`	`7`	`20`	`40`	`70`	`112`	`168`	`240`
`1`	`9`	`30`	`70`	`140`	`252`	`420`
`1`	`11`	`42`	`112`	`252`	`504`
`1`	`13`	`56`	`168`	`420`
`1`	`15`	`72`	`240`
`1`	`17`	`90`
`1`	`19`
`1`

A131108 as an upper right triangle

`1`	`1`	`2`	`2`	`2`	`2`	`2`	`2`	`2`	`2`	`2`
	`1`	`3`	`6`	`8`	`10`	`12`	`14`	`16`	`18`	`20`
		`1`	`5`	`12`	`20`	`30`	`42`	`56`	`72`	`90`
			`1`	`7`	`20`	`40`	`70`	`112`	`168`	`240`
				`1`	`9`	`30`	`70`	`140`	`252`	`420`
					`1`	`11`	`42`	`112`	`252`	`504`
						`1`	`13`	`56`	`168`	`420`
							`1`	`15`	`72`	`240`
								`1`	`17`	`90`
									`1`	`19`
										`1`

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 July 23 17:14 EDT 2024. Contains 374552 sequences. (Running on oeis4.)