A065843 - cp's OEIS frontend

A065843 Let u be any string of n digits from {0,1}; let f(u) = number of distinct primes, not beginning with 0, formed by permuting the digits of u to a base-2 number; then a(n) = max_u f(u).

n	a(n)
1	0
2	1
3	1
4	2
5	2
6	3
7	5
8	12
9	11
10	24
11	34
12	79
13	105
14	194
15	362
16	734
17	1143
18	2045
19	3872
20	7758
21	13001
22	23902
23	45539
24	90436
25	159510
26	296210
27	563833
28	1110387
29	2030754
30	3876871
31	7333827
32	14353074
33	26730538
34	51246344
35	97529176
36	190928828
37	358117285
38	694240090
39	1324674524
40	2587693929
41	4903604087
42	9547001123

[0, 1, 1, 2, 2, 3, 5, 12, 11, 24, 34, 79, 105, 194, 362, 734, 1143, 2045, 3872, 7758, 13001, 23902, 45539, 90436, 159510, 296210, 563833, 1110387, 2030754, 3876871, 7333827, 14353074, 26730538, 51246344, 97529176, 190928828, 358117285, 694240090, 1324674524, 2587693929, 4903604087, 9547001123]

cp's OEIS Frontend

A065843 Let u be any string of n digits from {0,1}; let f(u) = number of distinct primes, not beginning with 0, formed by permuting the digits of u to a base-2 number; then a(n) = max_u f(u).

Table of values

List of values