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A004259 10*log_2 (n) rounded down. 0
0, 10, 15, 20, 23, 25, 28, 30, 31, 33, 34, 35, 37, 38, 39, 40, 40, 41, 42, 43, 43, 44, 45, 45, 46, 47, 47, 48, 48, 49, 49, 50, 50, 50, 51, 51, 52, 52, 52, 53, 53, 53, 54, 54, 54, 55, 55, 55, 56, 56, 56, 57, 57, 57, 57 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Sequence in context: A118717 A181529 A138593 * A006623 A035166 A129495

Adjacent sequences:  A004256 A004257 A004258 * A004260 A004261 A004262

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 16 04:47 EST 2012. Contains 205860 sequences.