A162981 - OEIS

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

A162981 as a triangular array

												1
											1		1
										1		2		1
									1		3		3		1
								2		4		6		4		1
							4		7		10		10		5		1
						8		14		18		20		15		6		1
					17		29		36		39		35		21		7		1
				37		62		76		80		75		56		28		8		1
			82		136		165		172		161		132		84		36		9		1
		185		304		366		380		355		300		217		120		45		10		1
	423		690		826		855		800		684		525

A162981 as a square array

1	1	1	1	2	4	8	17	37	82	185	423
1	2	3	4	7	14	29	62	136	304	690
1	3	6	10	18	36	76	165	366	826
1	4	10	20	39	80	172	380	855
1	5	15	35	75	161	355	800
1	6	21	56	132	300	684
1	7	28	84	217	525
1	8	36	120
1	9	45
1	10
1

A162981 as an upper right triangle

1	1	1	1	2	4	8	17	37	82	185	423
	1	2	3	4	7	14	29	62	136	304	690
		1	3	6	10	18	36	76	165	366	826
			1	4	10	20	39	80	172	380	855
				1	5	15	35	75	161	355	800
					1	6	21	56	132	300	684
						1	7	28	84	217	525
							1	8	36	120
								1	9	45
									1	10
										1