A049020 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A049020 as a triangular array

										1
									1		1
								2		3		1
							5		10		6		1
						15		37		31		10		1
					52		151		160		75		15		1
				203		674		856		520		155		21		1
			877		3263		4802		3556		1400		287		28		1
		4140		17007		28337		24626		11991		3290		490		36		1
	21147		94828		175896		174805		101031		34671		6972		786		45		1

A049020 as a square array

1	1	2	5	15	52	203	877	4140	21147
1	3	10	37	151	674	3263	17007	94828
1	6	31	160	856	4802	28337	175896
1	10	75	520	3556	24626	174805
1	15	155	1400	11991	101031
1	21	287	3290	34671
1	28	490	6972
1	36	786
1	45
1

A049020 as an upper right triangle

1	1	2	5	15	52	203	877	4140	21147
	1	3	10	37	151	674	3263	17007	94828
		1	6	31	160	856	4802	28337	175896
			1	10	75	520	3556	24626	174805
				1	15	155	1400	11991	101031
					1	21	287	3290	34671
						1	28	490	6972
							1	36	786
								1	45
									1