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A053087 Lowest j for which 2^j kara n is defined. 2
0, 1, 3, 2, 5, 4, 5, 3, 7, 6, 5, 7, 6, 8, 7, 4, 9, 8, 7, 8, 9, 6, 9, 8, 9, 7, 9, 10, 8, 10, 9, 5, 11, 10, 9, 10, 8, 10, 11, 9, 10, 11, 7, 11, 10, 11, 9, 11, 10, 11, 12, 8, 11, 10, 12, 11, 9, 12, 11, 12, 10, 12, 11, 6, 13, 12, 11, 12, 10, 12, 11, 12, 13, 9, 12, 11, 13, 12, 10 (list; graph; refs; listen; history; internal format)
OFFSET

1,3

EXAMPLE

a(6)=4 because 2^3 kara 6 is undefined, but 16 kara 6 = 3.

CROSSREFS

Cf. A053405.

Sequence in context: A140061 A061313 A087669 * A062327 A075491 A089279

Adjacent sequences:  A053084 A053085 A053086 * A053088 A053089 A053090

KEYWORD

nonn

AUTHOR

Robert Lozyniak (11(AT)onna.com), Feb 26 2000

EXTENSIONS

More terms from Antony M. Goddard, cat(AT)animal.u-net.com or tony(AT)noggin.lowtech.org, Oct 13, 2000.

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.