OFFSET
1,2
COMMENTS
LINKS
T. D. Noe, Table of n, a(n) for n = 1..10000
FORMULA
Sum_{a(n) is odd} 1/a(n) = Sum_{a(n) is even} 1/a(n). If there are only five Fermat primes: 3,5,17,257,65537 (this is a well-known conjecture), then we have exactly Sum_{n>=1} 1/a(n) = 4294967295/1073741824 = 3.999999999068677425384521484375, which is twice the sum of the reciprocals of A143512. - Vladimir Shevelev and T. D. Noe, Dec 01 2010
MATHEMATICA
nn=34; logs=Log[2., {2, 3, 5, 17, 257, 65537}]; lim=Floor[nn/logs]; t={}; Do[z={i, j, k, l, m, n}.logs; If[z<nn, AppendTo[t, Round[2.^z]]], {i, 0, lim[[1]]}, {j, 0, lim[[2]]}, {k, 0, lim[[3]]}, {l, 0, lim[[4]]}, {m, 0, lim[[5]]}, {n, 0, lim[[6]]}]; t=Sort[t]
CROSSREFS
KEYWORD
nonn
AUTHOR
T. D. Noe, Aug 21 2008
STATUS
approved