A139286
a(n) = 2^(2*prime(n) - 1).
Original entry on oeis.org
8, 32, 512, 8192, 2097152, 33554432, 8589934592, 137438953472, 35184372088832, 144115188075855872, 2305843009213693952, 9444732965739290427392, 2417851639229258349412352, 38685626227668133590597632, 9903520314283042199192993792
Offset: 1
Cf.
A000040,
A000079,
A076274,
A139287,
A139288,
A139289,
A139290,
A139291,
A139292,
A139293,
A139294,
A139306.
A139287
2^(2p - 1) - 1, where p is prime.
Original entry on oeis.org
7, 31, 511, 8191, 2097151, 33554431, 8589934591, 137438953471, 35184372088831, 144115188075855871, 2305843009213693951, 9444732965739290427391, 2417851639229258349412351, 38685626227668133590597631
Offset: 1
Cf.
A000040,
A000079,
A076274,
A139286,
A139288,
A139289,
A139290,
A139291,
A139292,
A139293,
A139294,
A139306.
A139290
2^(2p - 1)/4, where p is prime.
Original entry on oeis.org
2, 8, 128, 2048, 524288, 8388608, 2147483648, 34359738368, 8796093022208, 36028797018963968, 576460752303423488, 2361183241434822606848, 604462909807314587353088, 9671406556917033397649408
Offset: 1
A139288
2^(2p - 1)/2, where p is prime.
Original entry on oeis.org
4, 16, 256, 4096, 1048576, 16777216, 4294967296, 68719476736, 17592186044416, 72057594037927936, 1152921504606846976, 4722366482869645213696, 1208925819614629174706176, 19342813113834066795298816
Offset: 1
A139289
(2^(2p - 1)/2)-1, where p is prime.
Original entry on oeis.org
3, 15, 255, 4095, 1048575, 16777215, 4294967295, 68719476735, 17592186044415, 72057594037927935, 1152921504606846975, 4722366482869645213695, 1208925819614629174706175, 19342813113834066795298815, 4951760157141521099596496895, 20282409603651670423947251286015, 83076749736557242056487941267521535
Offset: 1
-
Table[(2^(2 Prime[p] - 1)/2) - 1, {p, 1, 20}] (* Floris P. van Doorn and Jasper Mulder (florisvandoorn(AT)hotmail.com), Oct 12 2009 *)
More terms from
Floris P. van Doorn and Jasper Mulder (florisvandoorn(AT)hotmail.com), Oct 12 2009
A139292
2^(2p - 1)/8, where p is prime.
Original entry on oeis.org
1, 4, 64, 1024, 262144, 4194304, 1073741824, 17179869184, 4398046511104, 18014398509481984, 288230376151711744, 1180591620717411303424, 302231454903657293676544, 4835703278458516698824704
Offset: 1
A139291
a(n) = 2^(2*prime(n) - 3) - 1.
Original entry on oeis.org
1, 7, 127, 2047, 524287, 8388607, 2147483647, 34359738367, 8796093022207, 36028797018963967, 576460752303423487, 2361183241434822606847, 604462909807314587353087, 9671406556917033397649407, 2475880078570760549798248447, 10141204801825835211973625643007
Offset: 1
Showing 1-7 of 7 results.