A333392 - cp's OEIS frontend

A333392 a(0) = 1; thereafter a(n) = 2^(prime(n)-1) + Sum_{k=1..n} 2^(prime(n)-prime(k)).

n	a(n)
0	1
1	3
2	7
3	29
4	117
5	1873
6	7493
7	119889
8	479557
9	7672913
10	491066433
11	1964265733
12	125713006913
13	2011408110609
14	8045632442437
15	128730119078993
16	8238727621055553
17	527278567747555393
18	2109114270990221573
19	134983313343374180673
20	2159733013493986890769
21	8638932053975947563077

[1, 3, 7, 29, 117, 1873, 7493, 119889, 479557, 7672913, 491066433, 1964265733, 125713006913, 2011408110609, 8045632442437, 128730119078993, 8238727621055553, 527278567747555393, 2109114270990221573, 134983313343374180673, 2159733013493986890769, 8638932053975947563077]

cp's OEIS Frontend

A333392 a(0) = 1; thereafter a(n) = 2^(prime(n)-1) + Sum_{k=1..n} 2^(prime(n)-prime(k)).

Table of values

List of values