A108872 - OEIS

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A108872 as a triangular array

												2
											3		4
										4		5		6
									5		6		7		8
								6		7		8		9		10
							7		8		9		10		11		12
						8		9		10		11		12		13		14
					9		10		11		12		13		14		15		16
				10		11		12		13		14		15		16		17		18
			11		12		13		14		15		16		17		18		19		20
		12		13		14		15		16		17		18		19		20		21		22
	13		14		15		16		17		18		19		20		21		22

A108872 as a square array

2	3	4	5	6	7	8	9	10	11	12	13
4	5	6	7	8	9	10	11	12	13	14
6	7	8	9	10	11	12	13	14	15
8	9	10	11	12	13	14	15	16
10	11	12	13	14	15	16	17
12	13	14	15	16	17	18
14	15	16	17	18	19
16	17	18	19	20
18	19	20	21
20	21	22
22

A108872 as an upper right triangle

2	3	4	5	6	7	8	9	10	11	12	13
	4	5	6	7	8	9	10	11	12	13	14
		6	7	8	9	10	11	12	13	14	15
			8	9	10	11	12	13	14	15	16
				10	11	12	13	14	15	16	17
					12	13	14	15	16	17	18
						14	15	16	17	18	19
							16	17	18	19	20
								18	19	20	21
									20	21	22
										22