A263333 - OEIS

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A263333 as a triangular array

									1
								1		1
							3		6		3
						9		38		38		9
					23		226		1013		226		23
				51		1620		11447		11447		1620		51
			133		12653		232939		614393		232939		12653		133
		399		100234		5387677		38059944		38059944		5387677		100234		399
	1321		805414		123078860

A263333 as a square array

1	1	3	9	23	51	133	399	1321
1	6	38	226	1620	12653	100234	805414
3	38	1013	11447	232939	5387677	123078860
9	226	11447	614393	38059944
23	1620	232939	38059944
51	12653	5387677
133	100234
399

A263333 as an upper right triangle

1	1	3	9	23	51	133	399	1321
	1	6	38	226	1620	12653	100234	805414
		3	38	1013	11447	232939	5387677	123078860
			9	226	11447	614393	38059944
				23	1620	232939	38059944
					51	12653	5387677
						133	100234
							399