A003947 - cp's OEIS frontend

A003947 Expansion of (1+x)/(1-4*x).

n	a(n)
0	1
1	5
2	20
3	80
4	320
5	1280
6	5120
7	20480
8	81920
9	327680
10	1310720
11	5242880
12	20971520
13	83886080
14	335544320
15	1342177280
16	5368709120
17	21474836480
18	85899345920
19	343597383680
20	1374389534720
21	5497558138880
22	21990232555520
23	87960930222080
24	351843720888320

[1, 5, 20, 80, 320, 1280, 5120, 20480, 81920, 327680, 1310720, 5242880, 20971520, 83886080, 335544320, 1342177280, 5368709120, 21474836480, 85899345920, 343597383680, 1374389534720, 5497558138880, 21990232555520, 87960930222080, 351843720888320]

cp's OEIS Frontend

A003947 Expansion of (1+x)/(1-4*x).

Table of values

List of values