|
Search: id:A104511
|
|
|
| A104511 |
|
Last 3 digits of perfect numbers A000396. Whether a perfect number ends in 6 or 28, the preceding digit is odd except for the two initial terms. |
|
+0
8
|
|
| 6, 28, 496, 128, 336, 56, 328, 128, 176, 216, 128, 128, 976, 128, 328, 528, 776, 56, 536, 528, 216, 576, 336, 656, 376, 816, 456, 528, 528, 16, 128, 328, 936, 128, 616, 976, 856, 736
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
REFERENCES
|
Alfred S. Posamentier, Math Charmers, Tantalizing Tidbits for the Mind, Prometheus Books, NY, 2003, page 47.
|
|
MATHEMATICA
|
p={ the list of the Mersenne exponents (A000043) }; Mod[(PowerMod[2, p, 1000] - 1)(PowerMod[2, p - 1, 1000]), 1000]
|
|
CROSSREFS
|
Cf. A094540, A000396. See A000043 for the present state of knowledge about Mersenne primes.
Sequence in context: A035527 A085844 A083387 this_sequence A138876 A060286 A000396
Adjacent sequences: A104508 A104509 A104510 this_sequence A104512 A104513 A104514
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
Alfred S. Posamentier (asp2(AT)juno.com) and Robert G. Wilson v (rgwv(AT)rgwv.com), Feb 23 2005
|
|
|
Search completed in 0.002 seconds
|
