A200052 - cp's OEIS frontend

A200052 Number of -3..3 arrays x(0..n-1) of n elements with zero sum and elements alternately strictly increasing and strictly decreasing.

n	a(n)
1	1
2	6
3	22
4	78
5	288
6	1098
7	4224
8	16432
9	64310
10	253692
11	1003374
12	3992358
13	15908668
14	63684848
15	255153798
16	1026057576
17	4127971346
18	16658240722
19	67237254862
20	272092306164
21	1101134446908
22	4466186295698
23	18113540529096
24	73607652658268
25	299074725301088
26	1217290931946978

[1, 6, 22, 78, 288, 1098, 4224, 16432, 64310, 253692, 1003374, 3992358, 15908668, 63684848, 255153798, 1026057576, 4127971346, 16658240722, 67237254862, 272092306164, 1101134446908, 4466186295698, 18113540529096, 73607652658268, 299074725301088, 1217290931946978]

cp's OEIS Frontend

A200052 Number of -3..3 arrays x(0..n-1) of n elements with zero sum and elements alternately strictly increasing and strictly decreasing.

Table of values

List of values