A372540 - cp's OEIS frontend

A372540 Least k such that the k-th squarefree number has binary expansion of length n. Index of the smallest squarefree number >= 2^n.

n	a(n)
0	1
1	2
2	4
3	7
4	12
5	21
6	40
7	79
8	158
9	315
10	625
11	1246
12	2492
13	4983
14	9963
15	19921
16	39845
17	79689
18	159361
19	318726
20	637462
21	1274919
22	2549835
23	5099651
24	10199302
25	20398665
26	40797328
27	81594627
28	163189198
29	326378285
30	652756723
31	1305513584
32	2611027095
33	5222054082
34	10444108052

[1, 2, 4, 7, 12, 21, 40, 79, 158, 315, 625, 1246, 2492, 4983, 9963, 19921, 39845, 79689, 159361, 318726, 637462, 1274919, 2549835, 5099651, 10199302, 20398665, 40797328, 81594627, 163189198, 326378285, 652756723, 1305513584, 2611027095, 5222054082, 10444108052]

cp's OEIS Frontend

A372540 Least k such that the k-th squarefree number has binary expansion of length n. Index of the smallest squarefree number >= 2^n.

Table of values

List of values