A283938 - OEIS

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A283938 as a triangular array

											1
										4		2
									10		6		3
								18		13		8		5
							29		22		16		11		7
						43		34		26		20		14		9
					59		49		39		31		24		17		12
				78		66		55		45		36		28		21		15
			99		86		73		62		51		41		33		25		19
		123		108		94		81		69		57		47		38		30		23
	150		133		117		103		89		76		64		53		44		35

A283938 as a square array

1	4	10	18	29	43	59	78	99	123	150
2	6	13	22	34	49	66	86	108	133
3	8	16	26	39	55	73	94	117
5	11	20	31	45	62	81	103
7	14	24	36	51	69	89
9	17	28	41	57	76
12	21	33	47	64
15	25	38	53
19	30	44
23	35

A283938 as an upper right triangle

1	4	10	18	29	43	59	78	99	123	150
	2	6	13	22	34	49	66	86	108	133
		3	8	16	26	39	55	73	94	117
			5	11	20	31	45	62	81	103
				7	14	24	36	51	69	89
					9	17	28	41	57	76
						12	21	33	47	64
							15	25	38	53
								19	30	44
									23	35