A109225 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A109225 as a triangular array

												1
											1		1
										1		2		1
									1		3		4		1
								1		4		7		6		1
							1		5		12		13		8		1
						1		6		17		26		21		10		1
					1		7		24		43		48		31		12		1
				1		8		31		68		91		80		43		14		1
			1		9		40		99		160		171		124		57		16		1
		1		10		49		140		259		332		295		182		73		18		1
	1		11		60		189		400		591		628		477

A109225 as a square array

1	1	1	1	1	1	1	1	1	1	1	1
1	2	3	4	5	6	7	8	9	10	11
1	4	7	12	17	24	31	40	49	60
1	6	13	26	43	68	99	140	189
1	8	21	48	91	160	259	400
1	10	31	80	171	332	591
1	12	43	124	295	628
1	14	57	182	477
1	16	73
1	18
1

A109225 as an upper right triangle

1	1	1	1	1	1	1	1	1	1	1	1
	1	2	3	4	5	6	7	8	9	10	11
		1	4	7	12	17	24	31	40	49	60
			1	6	13	26	43	68	99	140	189
				1	8	21	48	91	160	259	400
					1	10	31	80	171	332	591
						1	12	43	124	295	628
							1	14	57	182	477
								1	16	73
									1	18
										1