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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

Number of bits in terms of A049606.

LINKS

Table of n, a(n) for n=0..61.

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: A001010 A091966 A231187 * A222735 A299408 A319381

Adjacent sequences:  A055526 A055527 A055528 * A055530 A055531 A055532

KEYWORD

nonn

AUTHOR

Jud McCranie, Jul 04 2000

STATUS

approved

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Last modified November 16 19:17 EST 2019. Contains 329201 sequences. (Running on oeis4.)