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A140598
a(1)=1. a(2n+1) = sum{k=1 to 2n} a(k). a(2n) = the smallest positive integer not yet occurring in the sequence.
0
1, 2, 3, 4, 10, 5, 25, 6, 56, 7, 119, 8, 246, 9, 501, 11, 1013, 12, 2038, 13, 4089, 14, 8192, 15, 16399, 16, 32814, 17, 65645, 18, 131308, 19, 262635, 20, 525290, 21, 1050601, 22, 2101224, 23, 4202471, 24, 8404966, 26, 16809958, 27, 33619943, 28, 67239914, 29
OFFSET
0,2
COMMENTS
This is a permutation of the positive integers.
CROSSREFS
Sequence in context: A158929 A255479 A256618 * A129920 A356332 A065634
KEYWORD
easy,nonn
AUTHOR
Leroy Quet, Jul 07 2008
EXTENSIONS
Extended by R. J. Mathar, Aug 04 2008
STATUS
approved