A198253 - OEIS

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A198253 as a triangular array

1

1 1

2 5 2

5 40 40 5

15 485 1675 485 15

51 6528 81440 81440 6528 51

187 90641 4059950 14520192 4059950 90641 187

715 1268648 203087097 2606019472 2606019472 203087097 1268648 715

2795 17794141 10164141586

A198253 as a square array

`1`	`1`	`2`	`5`	`15`	`51`	`187`	`715`	`2795`
`1`	`5`	`40`	`485`	`6528`	`90641`	`1268648`	`17794141`
`2`	`40`	`1675`	`81440`	`4059950`	`203087097`	`10164141586`
`5`	`485`	`81440`	`14520192`	`2606019472`
`15`	`6528`	`4059950`	`2606019472`
`51`	`90641`	`203087097`
`187`	`1268648`
`715`

A198253 as an upper right triangle

`1`	`1`	`2`	`5`	`15`	`51`	`187`	`715`	`2795`
	`1`	`5`	`40`	`485`	`6528`	`90641`	`1268648`	`17794141`
		`2`	`40`	`1675`	`81440`	`4059950`	`203087097`	`10164141586`
			`5`	`485`	`81440`	`14520192`	`2606019472`
				`15`	`6528`	`4059950`	`2606019472`
					`51`	`90641`	`203087097`
						`187`	`1268648`
							`715`

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Last modified April 25 11:21 EDT 2024. Contains 371967 sequences. (Running on oeis4.)