A197426 - OEIS

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A197426 as a simple table

`n`		`a(n)`
`1`		`4`
`2`		`20`
`3`		`68`
`4`		`448`
`5`		`2152`
`6`		`10684`
`7`		`55567`
`8`		`280544`
`9`		`1425111`
`10`		`7280350`
`11`		`37165198`
`12`		`189316196`
`13`		`965915209`
`14`		`4926863205`
`15`		`25123365839`
`16`		`128156345456`
`17`		`653685106884`
`18`		`3334114760247`
`19`		`17006120383127`
`20`		`86741818975198`
`21`		`442435364449588`

[4,20,68,448,2152,10684,55567,280544,1425111, 7280350,37165198,189316196,965915209,4926863205, 25123365839,128156345456,653685106884, 3334114760247,17006120383127,86741818975198, 442435364449588]

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Last modified August 17 12:19 EDT 2024. Contains 375210 sequences. (Running on oeis4.)