A131416 - OEIS

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A131416 as a triangular array

										1
									4		3
								8		8		5
							13		14		12		7
						19		21		20		16		9
					26		29		29		26		20		11
				34		38		39		37		32		24		13
			43		48		50		49		45		38		28		15
		53		59		62		62		59		53		44		32		17
	64		71		75		76		74		69		61		50		36		19

A131416 as a square array

1	4	8	13	19	26	34	43	53	64
3	8	14	21	29	38	48	59	71
5	12	20	29	39	50	62	75
7	16	26	37	49	62	76
9	20	32	45	59	74
11	24	38	53	69
13	28	44	61
15	32	50
17	36
19

A131416 as an upper right triangle

1	4	8	13	19	26	34	43	53	64
	3	8	14	21	29	38	48	59	71
		5	12	20	29	39	50	62	75
			7	16	26	37	49	62	76
				9	20	32	45	59	74
					11	24	38	53	69
						13	28	44	61
							15	32	50
								17	36
									19