A019220 - OEIS

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A019220 as a simple table

`n`		`a(n)`
`3`		`1`
`4`		`1`
`5`		`0`
`6`		`2`
`7`		`0`
`8`		`10`
`9`		`20`
`10`		`100`
`11`		`206`
`12`		`528`
`13`		`1008`
`14`		`2594`
`15`		`5618`
`16`		`15246`
`17`		`37564`
`18`		`100604`
`19`		`249758`
`20`		`651804`
`21`		`1633514`
`22`		`4233788`
`23`		`10771236`
`24`		`28036370`
`25`		`72289144`
`26`		`188906208`
`27`		`490896946`
`28`		`1286263486`
`29`		`3361239986`
`30`		`8831282324`
`31`		`23185222496`

[1,1,0,2,0,10,20,100,206,528,1008,2594,5618,15246, 37564,100604,249758,651804,1633514,4233788, 10771236,28036370,72289144,188906208,490896946, 1286263486,3361239986,8831282324,23185222496]

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Last modified April 18 09:20 EDT 2024. Contains 371769 sequences. (Running on oeis4.)