A281725 - OEIS

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A281725 as a triangular array

											1
										3		5
									6		7		15
								10		9		13		34
							15		11		24		21		65
						21		13		19		25		31		111
					28		15		33		58		54		43		175
				36		17		25		33		41		49		57		260
			45		19		42		37		115		55		96		73		369
		55		21		31		82		51		61		142		81		91		505
	66		23		51		45		84		201		117		89		150		111		671

A281725 as a square array

1	3	6	10	15	21	28	36	45	55	66
5	7	9	11	13	15	17	19	21	23
15	13	24	19	33	25	42	31	51
34	21	25	58	33	37	82	45
65	31	54	41	115	51	84
111	43	49	55	61	201
175	57	96	142	117
260	73	81	89
369	91	150
505	111
671

A281725 as an upper right triangle

1	3	6	10	15	21	28	36	45	55	66
	5	7	9	11	13	15	17	19	21	23
		15	13	24	19	33	25	42	31	51
			34	21	25	58	33	37	82	45
				65	31	54	41	115	51	84
					111	43	49	55	61	201
						175	57	96	142	117
							260	73	81	89
								369	91	150
									505	111
										671