A174403 - cp's OEIS frontend

A174403 Expansion of (1-2x-2x^2-sqrt(1-4x-4x^2+8x^3+4x^4))/(2*x^2).

n	a(n)
0	1
1	2
2	7
3	22
4	76
5	268
6	977
7	3638
8	13804
9	53164
10	207342
11	817212
12	3250104
13	13026744
14	52567461
15	213394854
16	870845260
17	3570590668
18	14701822370
19	60765209876
20	252021314536
21	1048538259304
22	4375013741962
23	18302920281148
24	76756814078840
25	322618359099896
26	1358831330368732

[1, 2, 7, 22, 76, 268, 977, 3638, 13804, 53164, 207342, 817212, 3250104, 13026744, 52567461, 213394854, 870845260, 3570590668, 14701822370, 60765209876, 252021314536, 1048538259304, 4375013741962, 18302920281148, 76756814078840, 322618359099896, 1358831330368732]

cp's OEIS Frontend

A174403 Expansion of (1-2x-2x^2-sqrt(1-4x-4x^2+8x^3+4x^4))/(2*x^2).

Table of values

List of values

cp's OEIS Frontend

A174403 Expansion of (1-2*x-2*x^2-sqrt(1-4*x-4*x^2+8*x^3+4*x^4))/(2*x^2).

Table of values

List of values

A174403 Expansion of (1-2x-2x^2-sqrt(1-4x-4x^2+8x^3+4x^4))/(2*x^2).