A121775 - OEIS

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A121775 as a triangular array

												1
											1		1
										2		3		1
									3		5		3		1
								4		8		7		4		1
							5		9		10		10		5		1
						6		15		20		21		15		6		1
					7		13		21		35		35		21		7		1
				8		20		36		60		71		56		28		8		1
			9		21		42		86		126		126		84		36		9		1
		10		27		59		130		215		253		210		120		45		10		1
	11		21		55		165		330		462		462		330		165		55

A121775 as a square array

1	1	2	3	4	5	6	7	8	9	10	11
1	3	5	8	9	15	13	20	21	27	21
1	3	7	10	20	21	36	42	59	55
1	4	10	21	35	60	86	130	165
1	5	15	35	71	126	215	330
1	6	21	56	126	253	462
1	7	28	84	210	462
1	8	36	120	330
1	9	45	165
1	10	55
1

A121775 as an upper right triangle

1	1	2	3	4	5	6	7	8	9	10	11
	1	3	5	8	9	15	13	20	21	27	21
		1	3	7	10	20	21	36	42	59	55
			1	4	10	21	35	60	86	130	165
				1	5	15	35	71	126	215	330
					1	6	21	56	126	253	462
						1	7	28	84	210	462
							1	8	36	120	330
								1	9	45	165
									1	10	55
										1