A243946 - cp's OEIS frontend

A243946 Expansion of sqrt( (1+x + sqrt(1-18x+x^2)) / (2(1-18*x+x^2)) ).

n	a(n)
0	1
1	7
2	91
3	1345
4	20995
5	337877
6	5544709
7	92234527
8	1549694195
9	26237641045
10	446925926881
11	7650344197987
12	131489964887341
13	2267722252458475
14	39224201631222475
15	680160975405238145
16	11820134678459908115
17	205812328555924135045
18	3589742656727603141425
19	62707329988264214752675

[1, 7, 91, 1345, 20995, 337877, 5544709, 92234527, 1549694195, 26237641045, 446925926881, 7650344197987, 131489964887341, 2267722252458475, 39224201631222475, 680160975405238145, 11820134678459908115, 205812328555924135045, 3589742656727603141425, 62707329988264214752675]

cp's OEIS Frontend

A243946 Expansion of sqrt( (1+x + sqrt(1-18x+x^2)) / (2(1-18*x+x^2)) ).

Table of values

List of values

cp's OEIS Frontend

A243946 Expansion of sqrt( (1+x + sqrt(1-18*x+x^2)) / (2*(1-18*x+x^2)) ).

Table of values

List of values

A243946 Expansion of sqrt( (1+x + sqrt(1-18x+x^2)) / (2(1-18*x+x^2)) ).