A277741 - OEIS

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A277741 as a triangular array

								1
							1		1
						1		2		1
					2		5		5		2
				3		13		20		13		3
			6		35		83		83		35		6
		12		104		340		504		340		12		27
	315		1401		2843		2843		1401		316		27		65
1021		5809		15578		21420		15578		5809		1021		65

A277741 as a square array

1	1	1	2	3	6	12	315	1021
1	2	5	13	35	104	1401	5809
1	5	20	83	340	2843	15578
2	13	83	504	2843	21420
3	35	340	1401	15578
6	12	316	5809
27	27	1021
65	65

A277741 as an upper right triangle

1	1	1	2	3	6	12	315	1021
	1	2	5	13	35	104	1401	5809
		1	5	20	83	340	2843	15578
			2	13	83	504	2843	21420
				3	35	340	1401	15578
					6	12	316	5809
						27	27	1021
							65	65