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A078555
Number of balanced numbers > 2^(n-1) and <= 2^n.
1
1, 1, 1, 1, 3, 1, 3, 3, 5, 5, 9, 6, 15, 15, 22, 31, 38, 46, 64, 76, 105, 124, 162, 225, 298, 375, 475, 602, 779, 1073, 1378, 1831, 2422, 3162, 4084, 5479, 7173, 9565, 12541, 16436, 21755, 28507, 37496, 49900, 65812, 87165, 114647, 153002, 203571, 268684
OFFSET
0,5
EXAMPLE
There are nine balanced numbers between 512 and 1024: {570, 594, 616, 630, 714, 744, 812, 840, 910}, so a(10) = 9.
CROSSREFS
Cf. A020492.
First differences of A078662.
Sequence in context: A186422 A165027 A342341 * A259286 A087891 A005885
KEYWORD
nonn
AUTHOR
Labos Elemer, Dec 06 2002
EXTENSIONS
a(22)-a(37) from Donovan Johnson, Mar 03 2013
a(38)-a(49) from Amiram Eldar, Jun 04 2024
STATUS
approved