A013988 - OEIS

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A013988 as a triangular array

1

5 1

55 15 1

935 295 30 1

21505 7425 925 50 1

623645 229405 32400 2225 75 1

21827575 8423415 1298605 103600 4550 105 1

894930575 358764175 59069010 5235405 271950 8330 140 1

42061737025 17398082625 3016869625 289426830 16929255 621810 14070 180 1

A013988 as a square array

`1`	`5`	`55`	`935`	`21505`	`623645`	`21827575`	`894930575`	`42061737025`
`1`	`15`	`295`	`7425`	`229405`	`8423415`	`358764175`	`17398082625`
`1`	`30`	`925`	`32400`	`1298605`	`59069010`	`3016869625`
`1`	`50`	`2225`	`103600`	`5235405`	`289426830`
`1`	`75`	`4550`	`271950`	`16929255`
`1`	`105`	`8330`	`621810`
`1`	`140`	`14070`
`1`	`180`
`1`

A013988 as an upper right triangle

`1`	`5`	`55`	`935`	`21505`	`623645`	`21827575`	`894930575`	`42061737025`
	`1`	`15`	`295`	`7425`	`229405`	`8423415`	`358764175`	`17398082625`
		`1`	`30`	`925`	`32400`	`1298605`	`59069010`	`3016869625`
			`1`	`50`	`2225`	`103600`	`5235405`	`289426830`
				`1`	`75`	`4550`	`271950`	`16929255`
					`1`	`105`	`8330`	`621810`
						`1`	`140`	`14070`
							`1`	`180`
								`1`

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Last modified May 16 00:16 EDT 2024. Contains 372549 sequences. (Running on oeis4.)