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A091270
Smallest number having in binary representation a prefix of length n that is also a suffix of its successor.
2
0, 2, 5, 13, 29, 61, 125, 253, 509, 1021, 2045, 4093, 8189, 16381, 32765, 65533, 131069, 262141, 524285, 1048573, 2097149, 4194301, 8388605, 16777213, 33554429, 67108861, 134217725, 268435453, 536870909, 1073741821
OFFSET
0,2
COMMENTS
A091269(a(n)) = n and A091269(m) < n for m<a(n);
a(n) = 2^(n+1) - 3 for n>2, cf. A036563.
CROSSREFS
Cf. A007088.
Sequence in context: A259678 A218152 A079991 * A376751 A214633 A282831
KEYWORD
nonn,base
AUTHOR
Reinhard Zumkeller, Dec 27 2003
STATUS
approved