A213561 - OEIS

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A213561 as a triangular array

										1
									7		3
								27		18		6
							77		61		34		10
						182		157		109		55		15
					378		342		267		171		81		21
				714		665		557		407		247		112		28
			1254		1190		1043		827		577		337		148		36
		2079		1998		1806		1512		1152		777		441		189		45
	3289		3189		2946		2562		2072		1532

A213561 as a square array

1	7	27	77	182	378	714	1254	2079	3289
3	18	61	157	342	665	1190	1998	3189
6	34	109	267	557	1043	1806	2946
10	55	171	407	827	1512	2562
15	81	247	577	1152	2072
21	112	337	777	1532
28	148	441
36	189
45

A213561 as an upper right triangle

1	7	27	77	182	378	714	1254	2079	3289
	3	18	61	157	342	665	1190	1998	3189
		6	34	109	267	557	1043	1806	2946
			10	55	171	407	827	1512	2562
				15	81	247	577	1152	2072
					21	112	337	777	1532
						28	148	441
							36	189
								45