A206987 - OEIS

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A206987 as a triangular array

									2
								4		4
							6		16		6
						10		36		36		10
					16		100		58		100		16
				26		256		158		158		256		26
			42		676		420		556		420		676		42
		68		1764		1066		1866		1866		1066		1764		68
	110		4624		2754		5804		7500		5804		2754		4624		110
178		12100		7140		18528		27762		27762		18528

A206987 as a square array

2	4	6	10	16	26	42	68	110	178
4	16	36	100	256	676	1764	4624	12100
6	36	58	158	420	1066	2754	7140
10	100	158	556	1866	5804	18528
16	256	420	1866	7500	27762
26	676	1066	5804	27762
42	1764	2754	18528
68	4624
110

A206987 as an upper right triangle

2	4	6	10	16	26	42	68	110	178
	4	16	36	100	256	676	1764	4624	12100
		6	36	58	158	420	1066	2754	7140
			10	100	158	556	1866	5804	18528
				16	256	420	1866	7500	27762
					26	676	1066	5804	27762
						42	1764	2754	18528
							68	4624
								110