A107880 - OEIS

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A107880 as a triangular array

											1
										2		1
									3		2		1
								7		5		2		1
							26		19		7		2		1
						141		104		37		9		2		1
					1034		766		268		61		11		2		1
				9693		7197		2496		550		91		13		2		1
			111522		82910		28612		6195		982		127		15		2		1
		1528112		1136923		391189		83837		12977		1596		169		17		2		1
	24372513		18141867		6230646		1326923		202494		24206		2424		217		19		2		1

A107880 as a square array

1	2	3	7	26	141	1034	9693	111522	1528112	24372513
1	2	5	19	104	766	7197	82910	1136923	18141867
1	2	7	37	268	2496	28612	391189	6230646
1	2	9	61	550	6195	83837	1326923
1	2	11	91	982	12977	202494
1	2	13	127	1596	24206
1	2	15	169	2424
1	2	17	217
1	2	19
1	2
1

A107880 as an upper right triangle

1	2	3	7	26	141	1034	9693	111522	1528112	24372513
	1	2	5	19	104	766	7197	82910	1136923	18141867
		1	2	7	37	268	2496	28612	391189	6230646
			1	2	9	61	550	6195	83837	1326923
				1	2	11	91	982	12977	202494
					1	2	13	127	1596	24206
						1	2	15	169	2424
							1	2	17	217
								1	2	19
									1	2
										1