A245846 - cp's OEIS frontend

A245846 Number of length n 0..3 arrays with new values introduced in order from both ends, and least squares fitting to a straight line with slope zero, with a single point taken as having zero slope.

n	a(n)
1	1
2	1
3	2
4	2
5	5
6	5
7	15
8	17
9	77
10	101
11	551
12	861
13	5433
14	9055
15	61725
16	107467
17	758905
18	1355573
19	9770843
20	17740093
21	129645671
22	238154311
23	1758252307
24	3258924505
25	24252921697
26	45276251763
27	339138059251
28	636861131319
29	4796151474225
30	9051310984485

[1, 1, 2, 2, 5, 5, 15, 17, 77, 101, 551, 861, 5433, 9055, 61725, 107467, 758905, 1355573, 9770843, 17740093, 129645671, 238154311, 1758252307, 3258924505, 24252921697, 45276251763, 339138059251, 636861131319, 4796151474225, 9051310984485]

cp's OEIS Frontend

A245846 Number of length n 0..3 arrays with new values introduced in order from both ends, and least squares fitting to a straight line with slope zero, with a single point taken as having zero slope.

Table of values

List of values