A273903 - OEIS

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A273903 as a triangular array

										1
									1		1
								2		2		1
							4		6		2		1
						8		14		10		2		1
					16		35		28		15		2		1
				33		84		88		46		21		2		1
			69		203		247		176		68		28		2		1
		146		486		693		558		311		94		36		2		1
	312		1163		1882		1786		1083		507		124		45		2		1
673		2776		5052		5410		3898		1900		780		158		55		2		1

A273903 as a square array

1	1	2	4	8	16	33	69	146	312	673
1	2	6	14	35	84	203	486	1163	2776
1	2	10	28	88	247	693	1882	5052
1	2	15	46	176	558	1786	5410
1	2	21	68	311	1083	3898
1	2	28	94	507	1900
1	2	36	124	780
1	2	45	158
1	2	55
1	2
1

A273903 as an upper right triangle

1	1	2	4	8	16	33	69	146	312	673
	1	2	6	14	35	84	203	486	1163	2776
		1	2	10	28	88	247	693	1882	5052
			1	2	15	46	176	558	1786	5410
				1	2	21	68	311	1083	3898
					1	2	28	94	507	1900
						1	2	36	124	780
							1	2	45	158
								1	2	55
									1	2
										1