A258993 - OEIS

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A258993 as a triangular array

1

1 3

1 6 5

1 10 15 7

1 15 35 28 9

1 21 70 84 45 11

1 28 126 210 165 66 13

1 36 210 462 495 286 91 15

1 45 330 924 1287 1001 455 120 17

1 55 495 1716 3003 3003 1820 680 153 19

1 66 715 3003 6435 8008 6188 3060 969 190 21

A258993 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`3`	`6`	`10`	`15`	`21`	`28`	`36`	`45`	`55`	`66`
`5`	`15`	`35`	`70`	`126`	`210`	`330`	`495`	`715`
`7`	`28`	`84`	`210`	`462`	`924`	`1716`	`3003`
`9`	`45`	`165`	`495`	`1287`	`3003`	`6435`
`11`	`66`	`286`	`1001`	`3003`	`8008`
`13`	`91`	`455`	`1820`	`6188`
`15`	`120`	`680`	`3060`
`17`	`153`	`969`
`19`	`190`
`21`

A258993 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`3`	`6`	`10`	`15`	`21`	`28`	`36`	`45`	`55`	`66`
		`5`	`15`	`35`	`70`	`126`	`210`	`330`	`495`	`715`
			`7`	`28`	`84`	`210`	`462`	`924`	`1716`	`3003`
				`9`	`45`	`165`	`495`	`1287`	`3003`	`6435`
					`11`	`66`	`286`	`1001`	`3003`	`8008`
						`13`	`91`	`455`	`1820`	`6188`
							`15`	`120`	`680`	`3060`
								`17`	`153`	`969`
									`19`	`190`
										`21`

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Last modified April 16 10:08 EDT 2024. Contains 371698 sequences. (Running on oeis4.)