A204002 - OEIS

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A204002 as a triangular array

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

A204002 as a square array

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

A204002 as an upper right triangle

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