A107724 - OEIS

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A107724 as a triangular array

										0
									1		0
								4		2		0
							31		10		3		0
						343		88		19		4		0
					4855		1066		199		31		5		0
				83209		16216		2779		382		46		6		0
			1670743		295360		47791		6130		655		64		7		0
		38436673		6254824		970849		119182		11929		1036		85		8		0
	996825703		150917560		22697647		2703730

A107724 as a square array

0	1	4	31	343	4855	83209	1670743	38436673	996825703
0	2	10	88	1066	16216	295360	6254824	150917560
0	3	19	199	2779	47791	970849	22697647
0	4	31	382	6130	119182	2703730
0	5	46	655	11929
0	6	64	1036
0	7	85
0	8
0

A107724 as an upper right triangle

0	1	4	31	343	4855	83209	1670743	38436673	996825703
	0	2	10	88	1066	16216	295360	6254824	150917560
		0	3	19	199	2779	47791	970849	22697647
			0	4	31	382	6130	119182	2703730
				0	5	46	655	11929
					0	6	64	1036
						0	7	85
							0	8
								0