A218134 - cp's OEIS frontend

A218134 Norm of coefficients in the expansion of 1/(1 - 2x - ix^2), where i is the imaginary unit.

n	a(n)
0	1
1	4
2	17
3	80
4	369
5	1700
6	7841
7	36160
8	166753
9	768996
10	3546289
11	16354000
12	75417809
13	347795396
14	1603886913
15	7396455680
16	34109360321
17	157298104900
18	725393076049
19	3345209499600
20	15426707209777
21	71141522037604
22	328074947492321
23	1512944453384000
24	6977067089461281

[1, 4, 17, 80, 369, 1700, 7841, 36160, 166753, 768996, 3546289, 16354000, 75417809, 347795396, 1603886913, 7396455680, 34109360321, 157298104900, 725393076049, 3345209499600, 15426707209777, 71141522037604, 328074947492321, 1512944453384000, 6977067089461281]

cp's OEIS Frontend

A218134 Norm of coefficients in the expansion of 1/(1 - 2x - ix^2), where i is the imaginary unit.

Table of values

List of values

cp's OEIS Frontend

A218134 Norm of coefficients in the expansion of 1/(1 - 2*x - i*x^2), where i is the imaginary unit.

Table of values

List of values

A218134 Norm of coefficients in the expansion of 1/(1 - 2x - ix^2), where i is the imaginary unit.