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A055529
Number of bits needed in mantissa to express n! exactly.
0
1, 1, 1, 2, 2, 4, 6, 9, 9, 12, 14, 18, 19, 23, 26, 30, 30, 34, 37, 41, 44, 48, 51, 56, 58, 62, 66, 71, 73, 78, 82, 87, 87, 92, 96, 101, 105, 110, 114, 119, 122, 127, 131, 137, 140, 146, 150, 156, 157, 163, 168, 173, 177, 183, 188, 193, 196, 202, 207, 213, 217, 223
OFFSET
0,4
COMMENTS
Number of bits in terms of A049606.
EXAMPLE
10! = 14175*2^8, 14175 can be represented exactly using 14 bit mantissa in binary floating point representation, so a(10)=14.
CROSSREFS
Cf. A049606.
Sequence in context: A357952 A091966 A231187 * A337723 A222735 A299408
KEYWORD
nonn
AUTHOR
Jud McCranie, Jul 04 2000
STATUS
approved