A131894 - OEIS

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A131894 as a triangular array

										1
									6		3
								11		6		5
							16		9		8		7
						21		12		11		10		9
					26		15		14		13		12		11
				31		18		17		16		15		14		13
			36		21		20		19		18		17		16		15
		41		24		23		22		21		20		19		18		17
	46		27		26		25		24		23		22		21		20		19

A131894 as a square array

1	6	11	16	21	26	31	36	41	46
3	6	9	12	15	18	21	24	27
5	8	11	14	17	20	23	26
7	10	13	16	19	22	25
9	12	15	18	21	24
11	14	17	20	23
13	16	19	22
15	18	21
17	20
19

A131894 as an upper right triangle

1	6	11	16	21	26	31	36	41	46
	3	6	9	12	15	18	21	24	27
		5	8	11	14	17	20	23	26
			7	10	13	16	19	22	25
				9	12	15	18	21	24
					11	14	17	20	23
						13	16	19	22
							15	18	21
								17	20
									19