A130879 - OEIS

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A130879 as a triangular array

2

3 6

4 12 22

5 20 93 278

6 30 276 6654 65814

7 42 655 65812 43053375 4295033110

8 56 1338 391280 4295033108 1853020231905216 18446744078004584726

9 72 2457 1680954 152588281905

A130879 as a square array

`2`	`3`	`4`	`5`	`6`	`7`	`8`	`9`
`6`	`12`	`20`	`30`	`42`	`56`	`72`
`22`	`93`	`276`	`655`	`1338`	`2457`
`278`	`6654`	`65812`	`391280`	`1680954`
`65814`	`43053375`	`4295033108`	`152588281905`
`4295033110`	`1853020231905216`
`18446744078004584726`

A130879 as an upper right triangle

`2`	`3`	`4`	`5`	`6`	`7`	`8`	`9`
	`6`	`12`	`20`	`30`	`42`	`56`	`72`
		`22`	`93`	`276`	`655`	`1338`	`2457`
			`278`	`6654`	`65812`	`391280`	`1680954`
				`65814`	`43053375`	`4295033108`	`152588281905`
					`4295033110`	`1853020231905216`
						`18446744078004584726`

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Last modified May 20 05:35 EDT 2013. Contains 225448 sequences.