A190064 - cp's OEIS frontend

A190064 Number of arrangements of n+1 nonzero numbers x(i) in -2..2 with the sum of div(x(i),x(i+1)), where div(a,b)=a/b produces the integer quotient implying a nonnegative remainder, equal to zero.

n	a(n)
1	2
2	12
3	40
4	144
5	550
6	1896
7	7584
8	27328
9	105348
10	398760
11	1538696
12	5872800
13	22646862
14	87492676
15	339055650
16	1313842904
17	5104724558
18	19873572892
19	77470783406
20	302258087616
21	1180840902336
22	4618922848536
23	18083348822516
24	70852652846320

[2, 12, 40, 144, 550, 1896, 7584, 27328, 105348, 398760, 1538696, 5872800, 22646862, 87492676, 339055650, 1313842904, 5104724558, 19873572892, 77470783406, 302258087616, 1180840902336, 4618922848536, 18083348822516, 70852652846320]

cp's OEIS Frontend

A190064 Number of arrangements of n+1 nonzero numbers x(i) in -2..2 with the sum of div(x(i),x(i+1)), where div(a,b)=a/b produces the integer quotient implying a nonnegative remainder, equal to zero.

Table of values

List of values