A025178 - OEIS

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A025178 as a simple table

`n`		`a(n)`
`1`		`0`
`2`		`2`
`3`		`4`
`4`		`12`
`5`		`32`
`6`		`90`
`7`		`252`
`8`		`714`
`9`		`2032`
`10`		`5814`
`11`		`16700`
`12`		`48136`
`13`		`139152`
`14`		`403286`
`15`		`1171380`
`16`		`3409020`
`17`		`9938304`
`18`		`29017878`
`19`		`84844044`
`20`		`248382516`
`21`		`727971360`
`22`		`2135784798`
`23`		`6272092596`
`24`		`18435108258`
`25`		`54228499920`
`26`		`159636389850`
`27`		`470256930052`
`28`		`1386170197704`

[0,2,4,12,32,90,252,714,2032,5814,16700,48136, 139152,403286,1171380,3409020,9938304,29017878, 84844044,248382516,727971360,2135784798, 6272092596,18435108258,54228499920,159636389850, 470256930052,1386170197704]

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Last modified April 23 02:23 EDT 2024. Contains 371906 sequences. (Running on oeis4.)