A053123 - OEIS

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A053123 as a triangular array

1

1 -2

1 -4 3

1 -6 10 -4

1 -8 21 -20 5

1 -10 36 -56 35 -6

1 -12 55 -120 126 -56 7

1 -14 78 -220 330 -252 84 -8

1 -16 105 -364 715 -792 462 -120 9

1 -18 136 -560 1365 -2002 1716 -792 165 -10

1 -20 171 -816 2380 -4368 5005 -3432 1287 -220 11

1

A053123 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`-2`	`-4`	`-6`	`-8`	`-10`	`-12`	`-14`	`-16`	`-18`	`-20`
`3`	`10`	`21`	`36`	`55`	`78`	`105`	`136`	`171`
`-4`	`-20`	`-56`	`-120`	`-220`	`-364`	`-560`	`-816`
`5`	`35`	`126`	`330`	`715`	`1365`	`2380`
`-6`	`-56`	`-252`	`-792`	`-2002`	`-4368`
`7`	`84`	`462`	`1716`	`5005`
`-8`	`-120`	`-792`	`-3432`
`9`	`165`	`1287`
`-10`	`-220`
`11`

A053123 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`-2`	`-4`	`-6`	`-8`	`-10`	`-12`	`-14`	`-16`	`-18`	`-20`
		`3`	`10`	`21`	`36`	`55`	`78`	`105`	`136`	`171`
			`-4`	`-20`	`-56`	`-120`	`-220`	`-364`	`-560`	`-816`
				`5`	`35`	`126`	`330`	`715`	`1365`	`2380`
					`-6`	`-56`	`-252`	`-792`	`-2002`	`-4368`
						`7`	`84`	`462`	`1716`	`5005`
							`-8`	`-120`	`-792`	`-3432`
								`9`	`165`	`1287`
									`-10`	`-220`
										`11`

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Last modified April 23 05:35 EDT 2024. Contains 371906 sequences. (Running on oeis4.)