A121416 - OEIS

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A121416 as a triangular array

										1
									2		1
								7		2		1
							43		9		2		1
						403		69		11		2		1
					5188		769		101		13		2		1
				85569		11346		1305		139		15		2		1
			1725291		208914		21745		2043		183		17		2		1
		41145705		4613976		443329		37971		3015		233		19		2		1
	1133047596		118840164		10679494		850260

A121416 as a square array

1	2	7	43	403	5188	85569	1725291	41145705	1133047596
1	2	9	69	769	11346	208914	4613976	118840164
1	2	11	101	1305	21745	443329	10679494
1	2	13	139	2043	37971	850260
1	2	15	183	3015
1	2	17	233
1	2	19
1	2
1

A121416 as an upper right triangle

1	2	7	43	403	5188	85569	1725291	41145705	1133047596
	1	2	9	69	769	11346	208914	4613976	118840164
		1	2	11	101	1305	21745	443329	10679494
			1	2	13	139	2043	37971	850260
				1	2	15	183	3015
					1	2	17	233
						1	2	19
							1	2
								1