A218897 - OEIS

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A218897 as a triangular array

									2
								2		4
							4		6		8
						6		18		16		16
					10		34		72		38		32
				16		86		212		286		98		64
			26		180		786		1096		1162		244		128
		42		426		2594		6280		6422		4700		614		256
	68		930		9110		28598		54726		35812		19046		1542		512
110		2140		31062		149238		373612		463746		202662

A218897 as a square array

2	2	4	6	10	16	26	42	68	110
4	6	18	34	86	180	426	930	2140
8	16	72	212	786	2594	9110	31062
16	38	286	1096	6280	28598	149238
32	98	1162	6422	54726	373612
64	244	4700	35812	463746
128	614	19046	202662
256	1542
512

A218897 as an upper right triangle

2	2	4	6	10	16	26	42	68	110
	4	6	18	34	86	180	426	930	2140
		8	16	72	212	786	2594	9110	31062
			16	38	286	1096	6280	28598	149238
				32	98	1162	6422	54726	373612
					64	244	4700	35812	463746
						128	614	19046	202662
							256	1542
								512