A168073 - cp's OEIS frontend

A168073 Expansion of 1 + 3(1-x-sqrt(1-2x-3*x^2))/2.

n	a(n)
0	1
1	0
2	3
3	3
4	6
5	12
6	27
7	63
8	153
9	381
10	969
11	2505
12	6564
13	17394
14	46533
15	125505
16	340902
17	931716
18	2560401
19	7070337
20	19609146
21	54597852
22	152556057
23	427642677
24	1202289669
25	3389281245
26	9578183391
27	27130207503
28	77009455428
29	219023318406
30	624069834627
31	1781228354487

[1, 0, 3, 3, 6, 12, 27, 63, 153, 381, 969, 2505, 6564, 17394, 46533, 125505, 340902, 931716, 2560401, 7070337, 19609146, 54597852, 152556057, 427642677, 1202289669, 3389281245, 9578183391, 27130207503, 77009455428, 219023318406, 624069834627, 1781228354487]

cp's OEIS Frontend

A168073 Expansion of 1 + 3(1-x-sqrt(1-2x-3*x^2))/2.

Table of values

List of values

cp's OEIS Frontend

A168073 Expansion of 1 + 3*(1-x-sqrt(1-2*x-3*x^2))/2.

Table of values

List of values

A168073 Expansion of 1 + 3(1-x-sqrt(1-2x-3*x^2))/2.