A344063 - cp's OEIS frontend

A344063 Expansion of Product_{k>=1} (1 + 4^(k-1)*x^k).

n	a(n)
0	1
1	1
2	4
3	20
4	80
5	384
6	1600
7	7424
8	30720
9	143360
10	593920
11	2703360
12	11403264
13	51118080
14	214958080
15	965738496
16	4047503360
17	17951621120
18	76168560640
19	334202142720
20	1411970498560
21	6211596451840
22	26203595472896
23	114246130073600
24	484815908372480
25	2101441598586880
26	8896148580335616

[1, 1, 4, 20, 80, 384, 1600, 7424, 30720, 143360, 593920, 2703360, 11403264, 51118080, 214958080, 965738496, 4047503360, 17951621120, 76168560640, 334202142720, 1411970498560, 6211596451840, 26203595472896, 114246130073600, 484815908372480, 2101441598586880, 8896148580335616]

cp's OEIS Frontend

A344063 Expansion of Product_{k>=1} (1 + 4^(k-1)*x^k).

Table of values

List of values