A223069 - cp's OEIS frontend

A223069 Number of n X 2 0..3 arrays with successive rows and columns fitting to straight lines with nondecreasing slope, with a single point array taken as having zero slope.

n	a(n)
1	16
2	150
3	1080
4	6627
5	36552
6	187000
7	905440
8	4206453
9	18933408
10	83153850
11	358250280
12	1520208679
13	6373759384
14	26468569500
15	109080982800
16	446806304505
17	1821267503280
18	7395000190750
19	29933239010200
20	120863093617131

[16, 150, 1080, 6627, 36552, 187000, 905440, 4206453, 18933408, 83153850, 358250280, 1520208679, 6373759384, 26468569500, 109080982800, 446806304505, 1821267503280, 7395000190750, 29933239010200, 120863093617131]

cp's OEIS Frontend

A223069 Number of n X 2 0..3 arrays with successive rows and columns fitting to straight lines with nondecreasing slope, with a single point array taken as having zero slope.

Table of values

List of values