A176228 - OEIS

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A176228 as a triangular array

											2
										3		3
									3		4		3
								4		6		6		4
							5		8		10		8		5
						7		11		16		16		11		7
					10		15		24		29		24		15		10
				15		21		35		49		49		35		21		15
			23		30		50		78		92		78		50		30		23
		36		44		71		119		161		161		119		71		44		36
	57		66		101		176		266		308		266		176		101		66		57

A176228 as a square array

2	3	3	4	5	7	10	15	23	36	57
3	4	6	8	11	15	21	30	44	66
3	6	10	16	24	35	50	71	101
4	8	16	29	49	78	119	176
5	11	24	49	92	161	266
7	15	35	78	161	308
10	21	50	119	266
15	30	71	176
23	44	101
36	66
57

A176228 as an upper right triangle

2	3	3	4	5	7	10	15	23	36	57
	3	4	6	8	11	15	21	30	44	66
		3	6	10	16	24	35	50	71	101
			4	8	16	29	49	78	119	176
				5	11	24	49	92	161	266
					7	15	35	78	161	308
						10	21	50	119	266
							15	30	71	176
								23	44	101
									36	66
										57