A257390 - OEIS

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A257390 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`1`
`3`		`4`
`4`		`18`
`5`		`80`
`6`		`357`
`7`		`1596`
`8`		`7150`
`9`		`32096`
`10`		`144362`
`11`		`650568`
`12`		`2937316`
`13`		`13286368`
`14`		`60205805`
`15`		`273290988`
`16`		`1242639446`
`17`		`5659468736`
`18`		`25816338046`
`19`		`117945079736`
`20`		`539646216188`
`21`		`2472638868960`
`22`		`11345220210658`
`23`		`52124831171544`
`24`		`239792244636876`
`25`		`1104495824173376`

[1,0,1,4,18,80,357,1596,7150,32096,144362,650568, 2937316,13286368,60205805,273290988,1242639446, 5659468736,25816338046,117945079736,539646216188, 2472638868960,11345220210658,52124831171544, 239792244636876,1104495824173376]

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Last modified August 9 13:01 EDT 2024. Contains 375042 sequences. (Running on oeis4.)