A178831 - OEIS

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A178831 as a triangular array

1

1 3

1 9 6

1 21 30 10

1 45 114 70 15

1 93 390 370 135 21

1 189 1266 1750 915 231 28

1 381 3990 7810 5535 1911 364 36

1 765 12354 33670 31515 14091 3556 540 45

1 1533 37830 141970 172935 97671 30940 6084 765 55

A178831 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`3`	`9`	`21`	`45`	`93`	`189`	`381`	`765`	`1533`
`6`	`30`	`114`	`390`	`1266`	`3990`	`12354`	`37830`
`10`	`70`	`370`	`1750`	`7810`	`33670`	`141970`
`15`	`135`	`915`	`5535`	`31515`	`172935`
`21`	`231`	`1911`	`14091`	`97671`
`28`	`364`	`3556`	`30940`
`36`	`540`	`6084`
`45`	`765`
`55`

A178831 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`3`	`9`	`21`	`45`	`93`	`189`	`381`	`765`	`1533`
		`6`	`30`	`114`	`390`	`1266`	`3990`	`12354`	`37830`
			`10`	`70`	`370`	`1750`	`7810`	`33670`	`141970`
				`15`	`135`	`915`	`5535`	`31515`	`172935`
					`21`	`231`	`1911`	`14091`	`97671`
						`28`	`364`	`3556`	`30940`
							`36`	`540`	`6084`
								`45`	`765`
									`55`

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Last modified April 17 23:17 EDT 2024. Contains 371767 sequences. (Running on oeis4.)