A385082 - cp's OEIS frontend

A385082 Sum of squared coefficients of Product_{i=0..n-1} 1+x^(2^i+1)+x^(2^(i+1)+1).

n	a(n)
0	1
1	3
2	13
3	55
4	249
5	1121
6	5025
7	22607
8	101931
9	460877
10	2088687
11	9482763
12	43109307
13	196163983
14	893222041
15	4069162197
16	18543631161
17	84525140297
18	385343891847
19	1756959373157
20	8011450183181
21	36533108258455
22	166602342944307
23	759783053580809
24	3465042771956289
25	15802856371611411

[1, 3, 13, 55, 249, 1121, 5025, 22607, 101931, 460877, 2088687, 9482763, 43109307, 196163983, 893222041, 4069162197, 18543631161, 84525140297, 385343891847, 1756959373157, 8011450183181, 36533108258455, 166602342944307, 759783053580809, 3465042771956289, 15802856371611411]

cp's OEIS Frontend

A385082 Sum of squared coefficients of Product_{i=0..n-1} 1+x^(2^i+1)+x^(2^(i+1)+1).

Table of values

List of values