A262488 - OEIS

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A262488 as a triangular array

										2
									3		3
								5		5		5
							10		9		9		10
						20		23		17		23		20
					40		63		61		61		63		40
				79		171		245		389		245		171		79
			158		449		877		2699		2699		877		449		158
		316		1251		3025		16108		33742		16108		3025		1251		316
	631		3753		11357		93941		364259		364259		93941		11357		3753

A262488 as a square array

2	3	5	10	20	40	79	158	316	631
3	5	9	23	63	171	449	1251	3753
5	9	17	61	245	877	3025	11357
10	23	61	389	2699	16108	93941
20	63	245	2699	33742	364259
40	171	877	16108	364259
79	449	3025	93941
158	1251	11357
316	3753

A262488 as an upper right triangle

2	3	5	10	20	40	79	158	316	631
	3	5	9	23	63	171	449	1251	3753
		5	9	17	61	245	877	3025	11357
			10	23	61	389	2699	16108	93941
				20	63	245	2699	33742	364259
					40	171	877	16108	364259
						79	449	3025	93941
							158	1251	11357
								316	3753