A180887 - OEIS

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A180887 as a triangular array

2

3 3

6 12 6

10 50 50 10

20 160 360 160 20

35 525 1960 1960 525 35

70 1540 10010 17080 10010 1540 70

126 4662 45738 130914 130914 45738 4662 126

252 13104 203616 877968 1438920 877968 203616 13104 252

462 38346

A180887 as a square array

`2`	`3`	`6`	`10`	`20`	`35`	`70`	`126`	`252`	`462`
`3`	`12`	`50`	`160`	`525`	`1540`	`4662`	`13104`	`38346`
`6`	`50`	`360`	`1960`	`10010`	`45738`	`203616`
`10`	`160`	`1960`	`17080`	`130914`	`877968`
`20`	`525`	`10010`	`130914`	`1438920`
`35`	`1540`	`45738`	`877968`
`70`	`4662`	`203616`
`126`	`13104`
`252`

A180887 as an upper right triangle

`2`	`3`	`6`	`10`	`20`	`35`	`70`	`126`	`252`	`462`
	`3`	`12`	`50`	`160`	`525`	`1540`	`4662`	`13104`	`38346`
		`6`	`50`	`360`	`1960`	`10010`	`45738`	`203616`
			`10`	`160`	`1960`	`17080`	`130914`	`877968`
				`20`	`525`	`10010`	`130914`	`1438920`
					`35`	`1540`	`45738`	`877968`
						`70`	`4662`	`203616`
							`126`	`13104`
								`252`

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Last modified April 19 13:40 EDT 2024. Contains 371792 sequences. (Running on oeis4.)