A218138 - cp's OEIS frontend

A218138 Sum of absolute values of real and imaginary parts of the coefficients in the expansion of 1 / (1 - x - 2Ix^2), where I^2=-1.

n	a(n)
0	1
1	1
2	3
3	5
4	9
5	19
6	25
7	59
8	109
9	147
10	359
11	653
12	899
13	2205
14	3915
15	5715
16	13545
17	23347
18	36229
19	82923
20	138781
21	228653
22	506215
23	822381
24	1437267
25	3082029
26	4856667
27	9000947
28	18714281
29	28578195
30	56172277
31	113328667
32	167517773
33	349394765
34	684430311
35	977894349
36	2166392995

[1, 1, 3, 5, 9, 19, 25, 59, 109, 147, 359, 653, 899, 2205, 3915, 5715, 13545, 23347, 36229, 82923, 138781, 228653, 506215, 822381, 1437267, 3082029, 4856667, 9000947, 18714281, 28578195, 56172277, 113328667, 167517773, 349394765, 684430311, 977894349, 2166392995]

cp's OEIS Frontend

A218138 Sum of absolute values of real and imaginary parts of the coefficients in the expansion of 1 / (1 - x - 2Ix^2), where I^2=-1.

Table of values

List of values

cp's OEIS Frontend

A218138 Sum of absolute values of real and imaginary parts of the coefficients in the expansion of 1 / (1 - x - 2*I*x^2), where I^2=-1.

Table of values

List of values

A218138 Sum of absolute values of real and imaginary parts of the coefficients in the expansion of 1 / (1 - x - 2Ix^2), where I^2=-1.