A370498 - cp's OEIS frontend

A370498 Number of paths from (0, 0) to (2n, 2n) in an n X n grid using only steps north, northeast and east (i.e., steps (1, 0), (1, 1), and (0, 1)) and that do not pass through diagonal points with odd coordinates.

n	a(n)
0	1
1	4
2	60
3	1204
4	27724
5	691812
6	18198492
7	496924692
8	13951437804
9	400212569284
10	11679079547260
11	345621250279284
12	10347645099250060
13	312857431914558244
14	9538937406065229084
15	292961855077076241108
16	9054857076142602126636
17	281439018537947499788676
18	8791174819979940884130492

[1, 4, 60, 1204, 27724, 691812, 18198492, 496924692, 13951437804, 400212569284, 11679079547260, 345621250279284, 10347645099250060, 312857431914558244, 9538937406065229084, 292961855077076241108, 9054857076142602126636, 281439018537947499788676, 8791174819979940884130492]

cp's OEIS Frontend

A370498 Number of paths from (0, 0) to (2n, 2n) in an n X n grid using only steps north, northeast and east (i.e., steps (1, 0), (1, 1), and (0, 1)) and that do not pass through diagonal points with odd coordinates.

Table of values

List of values