A225900 - OEIS

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A225900 as a triangular array

										2
									4		4
								7		12		7
							11		33		33		11
						16		78		145		78		16
					22		162		545		545		162		22
				29		304		1770		3459		1770		304		29
			37		527		5052		19270		19270		5052		527		37
		46		858		12910		93428		193122		93428		12910		858		46
	56		1328		30055		396804		1706655		1706655

A225900 as a square array

2	4	7	11	16	22	29	37	46	56
4	12	33	78	162	304	527	858	1328
7	33	145	545	1770	5052	12910	30055
11	78	545	3459	19270	93428	396804
16	162	1770	19270	193122	1706655
22	304	5052	93428	1706655
29	527	12910
37	858
46

A225900 as an upper right triangle

2	4	7	11	16	22	29	37	46	56
	4	12	33	78	162	304	527	858	1328
		7	33	145	545	1770	5052	12910	30055
			11	78	545	3459	19270	93428	396804
				16	162	1770	19270	193122	1706655
					22	304	5052	93428	1706655
						29	527	12910
							37	858
								46