login
A278312
a(n) = denominator of n/(2^(2*n+1)).
0
1, 8, 16, 128, 128, 2048, 4096, 32768, 16384, 524288, 1048576, 8388608, 8388608, 134217728, 268435456, 2147483648, 536870912, 34359738368, 68719476736, 549755813888, 549755813888, 8796093022208, 17592186044416, 140737488355328, 70368744177664, 2251799813685248
OFFSET
0,2
MATHEMATICA
a[n_] = n/(2^(2*n + 1)); Denominator /@ a /@ Range[0, 25]
CROSSREFS
Cf. A000265 (numerators).
Sequence in context: A264472 A264478 A277364 * A107906 A328127 A323385
KEYWORD
nonn,frac
AUTHOR
Ralf Steiner, Feb 09 2017
STATUS
approved