A183517 - OEIS

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A183517 as a triangular array

											1
										2		2
									3		4		3
								4		11		11		4
							6		24		37		24		6
						9		56		138		138		56		9
					13		121		427		736		427		121		13
				19		272		1444		3504		3504		1444		272		19
			28		612		4903		18288		24194		18288		4903		612		28
		41		1373		16506		94376		182372		182372		94376		16506		1373		41
	60

A183517 as a square array

1	2	3	4	6	9	13	19	28	41	60
2	4	11	24	56	121	272	612	1373
3	11	37	138	427	1444	4903	16506
4	24	138	736	3504	18288	94376
6	56	427	3504	24194	182372
9	121	1444	18288	182372
13	272	4903	94376
19	612	16506
28	1373
41

A183517 as an upper right triangle

1	2	3	4	6	9	13	19	28	41	60
	2	4	11	24	56	121	272	612	1373
		3	11	37	138	427	1444	4903	16506
			4	24	138	736	3504	18288	94376
				6	56	427	3504	24194	182372
					9	121	1444	18288	182372
						13	272	4903	94376
							19	612	16506
								28	1373
									41