A071356 - cp's OEIS frontend

A071356 Expansion of (1 - 2x - sqrt(1 - 4x - 4x^2))/(4x^2).

n	a(n)
0	1
1	2
2	6
3	20
4	72
5	272
6	1064
7	4272
8	17504
9	72896
10	307648
11	1312896
12	5655808
13	24562176
14	107419264
15	472675072
16	2091206144
17	9296612352
18	41507566592
19	186045061120
20	836830457856
21	3776131489792
22	17089399689216
23	77548125675520
24	352766964908032

[1, 2, 6, 20, 72, 272, 1064, 4272, 17504, 72896, 307648, 1312896, 5655808, 24562176, 107419264, 472675072, 2091206144, 9296612352, 41507566592, 186045061120, 836830457856, 3776131489792, 17089399689216, 77548125675520, 352766964908032]

cp's OEIS Frontend

A071356 Expansion of (1 - 2x - sqrt(1 - 4x - 4x^2))/(4x^2).

Table of values

List of values

cp's OEIS Frontend

A071356 Expansion of (1 - 2*x - sqrt(1 - 4*x - 4*x^2))/(4*x^2).

Table of values

List of values

A071356 Expansion of (1 - 2x - sqrt(1 - 4x - 4x^2))/(4x^2).