|
Search: id:A101329
|
|
|
| A101329 |
|
2^(2^(2^x)+1)-1 = M(F(x)) == Mersenne(Fermat(x)) |
|
+0
1
|
|
| 7, 31, 131071, 231584178474632390847141970017375815706539969331281128078915168015826259279871
(list; graph; listen)
|
|
|
OFFSET
|
0,1
|
|
|
COMMENT
|
Mersenne-Fermat numbers.
|
|
FORMULA
|
a(n) = A070969(2^n)-2. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 22 2007
|
|
EXAMPLE
|
M(F(0))=7
M(F(1))=31
M(F(2))=131071
M(F(3))=31231584178474632390847141970017375815706539969331281128078915168015826259279871
|
|
PROGRAM
|
(PARI) for(x=0, 3, print(2^(2^(2^x)+1)-1))
|
|
CROSSREFS
|
Adjacent sequences: A101326 A101327 A101328 this_sequence A101330 A101331 A101332
Sequence in context: A139307 A134709 A139314 this_sequence A067811 A044084 A044465
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Jorge Coveiro (jorgecoveiro(AT)yahoo.com), Dec 24 2004
|
|
|
Search completed in 0.004 seconds
|
