A215204 - OEIS

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A215204 as a triangular array

										1
									1		1
								1		1		2
							1		1		2		3
						1		1		4		4		5
					1		1		10		26		10		7
				1		1		28		276		258		26		11
			1		1		84		3740		14318		3346		76		15
		1		1		264		58604		1161678		1214358		54108		232		22
	1		1		858		1010616		118316062		741215012		150910592		1054256		764		30

A215204 as a square array

1	1	1	1	1	1	1	1	1	1
1	1	1	1	1	1	1	1	1
2	2	4	10	28	84	264	858
3	4	26	276	3740	58604	1010616
5	10	258	14318	1161678	118316062
7	26	3346	1214358	741215012
11	76	54108	150910592
15	232	1054256
22	764
30

A215204 as an upper right triangle

1	1	1	1	1	1	1	1	1	1
	1	1	1	1	1	1	1	1	1
		2	2	4	10	28	84	264	858
			3	4	26	276	3740	58604	1010616
				5	10	258	14318	1161678	118316062
					7	26	3346	1214358	741215012
						11	76	54108	150910592
							15	232	1054256
								22	764
									30