A277819 - OEIS

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A277819 as a triangular array

												1
											2		3
										7		6		5
									4		9		10		15
								13		12		27		30		17
							14		23		20		45		34		51
						11		18		57		60		119		102		85
					8		29		54		75		68		153		170		255
				25		24		39		90		221		204		427		510		257
			26		43		40		105		238		359		340		765		514		771
		31		46		125		120		187		306		937		1020		1799		1542		1285
	28		33		114		135		136		461		854		1275		1028		2313		2570		3855

A277819 as a square array

1	2	7	4	13	14	11	8	25	26	31	28
3	6	9	12	23	18	29	24	43	46	33
5	10	27	20	57	54	39	40	125	114
15	30	45	60	75	90	105	120	135
17	34	119	68	221	238	187	136
51	102	153	204	359	306	461
85	170	427	340	937	854
255	510	765	1020	1275
257	514	1799	1028
771	1542	2313
1285	2570
3855

A277819 as an upper right triangle

1	2	7	4	13	14	11	8	25	26	31	28
	3	6	9	12	23	18	29	24	43	46	33
		5	10	27	20	57	54	39	40	125	114
			15	30	45	60	75	90	105	120	135
				17	34	119	68	221	238	187	136
					51	102	153	204	359	306	461
						85	170	427	340	937	854
							255	510	765	1020	1275
								257	514	1799	1028
									771	1542	2313
										1285	2570
											3855