A077643 - cp's OEIS frontend

A077643 Number of squarefree integers in closed interval [2^n, -1 + 2*2^n], i.e., among 2^n consecutive numbers beginning with 2^n.

n	a(n)
0	1
1	2
2	3
3	5
4	9
5	19
6	39
7	79
8	157
9	310
10	621
11	1246
12	2491
13	4980
14	9958
15	19924
16	39844
17	79672
18	159365
19	318736
20	637457
21	1274916
22	2549816
23	5099651
24	10199363
25	20398663
26	40797299
27	81594571
28	163189087
29	326378438
30	652756861
31	1305513511
32	2611026987
33	5222053970
34	10444108084

[1, 2, 3, 5, 9, 19, 39, 79, 157, 310, 621, 1246, 2491, 4980, 9958, 19924, 39844, 79672, 159365, 318736, 637457, 1274916, 2549816, 5099651, 10199363, 20398663, 40797299, 81594571, 163189087, 326378438, 652756861, 1305513511, 2611026987, 5222053970, 10444108084]

cp's OEIS Frontend

A077643 Number of squarefree integers in closed interval [2^n, -1 + 2*2^n], i.e., among 2^n consecutive numbers beginning with 2^n.

Table of values

List of values