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A155588 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`6`
`2`		`28`
`3`		`132`
`4`		`640`
`5`		`3156`
`6`		`15688`
`7`		`78252`
`8`		`390880`
`9`		`1953636`
`10`		`9766648`
`11`		`48830172`
`12`		`244144720`
`13`		`1220711316`
`14`		`6103532008`
`15`		`30517610892`
`16`		`152587956160`
`17`		`762939584196`
`18`		`3814697527768`
`19`		`19073486852412`
`20`		`95367432689200`
`21`		`476837160300276`

[1,6,28,132,640,3156,15688,78252,390880,1953636, 9766648,48830172,244144720,1220711316,6103532008, 30517610892,152587956160,762939584196, 3814697527768,19073486852412,95367432689200, 476837160300276]

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Last modified September 12 14:14 EDT 2024. Contains 375851 sequences. (Running on oeis4.)