A280398 - OEIS

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A280398 as a triangular array

										0
									0		0
								2		2		0
							2		6		14		0
						8		16		66		74		0
					14		34		238		554		358		0
				36		76		769		3002		4250		1666		0
			74		158		2432		15476		35676		31242		7582		0
		168		336		7440		78540		292622		410670		223706		33978		0
	358		698		22494		388686		2366358		5338004

A280398 as a square array

0	0	2	2	8	14	36	74	168	358
0	2	6	16	34	76	158	336	698
0	14	66	238	769	2432	7440	22494
0	74	554	3002	15476	78540	388686
0	358	4250	35676	292622	2366358
0	1666	31242	410670	5338004
0	7582	223706
0	33978
0

A280398 as an upper right triangle

0	0	2	2	8	14	36	74	168	358
	0	2	6	16	34	76	158	336	698
		0	14	66	238	769	2432	7440	22494
			0	74	554	3002	15476	78540	388686
				0	358	4250	35676	292622	2366358
					0	1666	31242	410670	5338004
						0	7582	223706
							0	33978
								0