A344556 - cp's OEIS frontend

A344556 a(n) = [x^n] 2 / (1 - (2n - 1)x + sqrt(1 - 2x - 3x^2)).

n	a(n)
0	1
1	1
2	5
3	34
4	315
5	3741
6	54531
7	944035
8	18934763
9	431773963
10	11030464423
11	312023972228
12	9680623848325
13	326823162461823
14	11926991260987869
15	467837288974848642
16	19628089812933434547
17	877052336082168698715
18	41581946832665768549007
19	2084818230218269733957646

[1, 1, 5, 34, 315, 3741, 54531, 944035, 18934763, 431773963, 11030464423, 312023972228, 9680623848325, 326823162461823, 11926991260987869, 467837288974848642, 19628089812933434547, 877052336082168698715, 41581946832665768549007, 2084818230218269733957646]

cp's OEIS Frontend

A344556 a(n) = [x^n] 2 / (1 - (2n - 1)x + sqrt(1 - 2x - 3x^2)).

Table of values

List of values

cp's OEIS Frontend

A344556 a(n) = [x^n] 2 / (1 - (2*n - 1)*x + sqrt(1 - 2*x - 3*x^2)).

Table of values

List of values

A344556 a(n) = [x^n] 2 / (1 - (2n - 1)x + sqrt(1 - 2x - 3x^2)).