A379824 - cp's OEIS frontend

A379824 a(n) = [x^n] 2 / (1 + x(2x + 3) + sqrt((x + 1)(1 - 3x))). Alternating row sums of A379907.

n	a(n)
0	1
1	-1
2	1
3	0
4	1
5	2
6	5
7	12
8	31
9	79
10	207
11	546
12	1457
13	3919
14	10621
15	28968
16	79459
17	219053
18	606611
19	1686660
20	4706879
21	13178956
22	37012219
23	104235300
24	294301801
25	832901237
26	2362328425
27	6713749632
28	19116443881
29	54526962682
30	155785926413
31	445772216816
32	1277394033603

[1, -1, 1, 0, 1, 2, 5, 12, 31, 79, 207, 546, 1457, 3919, 10621, 28968, 79459, 219053, 606611, 1686660, 4706879, 13178956, 37012219, 104235300, 294301801, 832901237, 2362328425, 6713749632, 19116443881, 54526962682, 155785926413, 445772216816, 1277394033603]

cp's OEIS Frontend

A379824 a(n) = [x^n] 2 / (1 + x(2x + 3) + sqrt((x + 1)(1 - 3x))). Alternating row sums of A379907.

Table of values

List of values

cp's OEIS Frontend

A379824 a(n) = [x^n] 2 / (1 + x*(2*x + 3) + sqrt((x + 1)*(1 - 3*x))). Alternating row sums of A379907.

Table of values

List of values

A379824 a(n) = [x^n] 2 / (1 + x(2x + 3) + sqrt((x + 1)(1 - 3x))). Alternating row sums of A379907.