A135620 a(n) = 2^(prime(n) - 2).
1, 2, 8, 32, 512, 2048, 32768, 131072, 2097152, 134217728, 536870912, 34359738368, 549755813888, 2199023255552, 35184372088832, 2251799813685248, 144115188075855872, 576460752303423488, 36893488147419103232, 590295810358705651712, 2361183241434822606848, 151115727451828646838272
Offset: 1
Links
- G. C. Greubel, Table of n, a(n) for n = 1..465
Programs
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Magma
[2^(NthPrime(n)-2): n in [1..25]]; // Vincenzo Librandi, Oct 23 2016
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Mathematica
Table[2^(Prime[n] - 2), {n,1,25}] (* G. C. Greubel, Oct 23 2016 *) -
PARI
a(n) = 2^(prime(n)-2); \\ Michel Marcus, Oct 23 2016