A052253 - OEIS

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A052253 as a triangular array

												1
											1		1
										2		1		1
									3		3		2		1
								8		5		4		2		1
							16		13		9		6		3		1
						41		28		21		13		8		3		1
					98		71		49		33		20		10		4		1
				250		174		121		79		50		27		13		4		1
			631		445		304		201		127		74		38		16		5		1
		1646		1137		776		510		325		192		106		49		19		5		1
	4285		2974

A052253 as a square array

1	1	2	3	8	16	41	98	250	631	1646	4285
1	1	3	5	13	28	71	174	445	1137	2974
1	2	4	9	21	49	121	304	776
1	2	6	13	33	79	201	510
1	3	8	20	50	127	325
1	3	10	27	74	192
1	4	13	38	106
1	4	16	49
1	5	19
1	5
1

A052253 as an upper right triangle

1	1	2	3	8	16	41	98	250	631	1646	4285
	1	1	3	5	13	28	71	174	445	1137	2974
		1	2	4	9	21	49	121	304	776
			1	2	6	13	33	79	201	510
				1	3	8	20	50	127	325
					1	3	10	27	74	192
						1	4	13	38	106
							1	4	16	49
								1	5	19
									1	5
										1