A055529 Number of bits needed in mantissa to express n! exactly.

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.

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: A357952 A091966 A231187 * A337723 A222735 A299408

Adjacent sequences: A055526 A055527 A055528 * A055530 A055531 A055532

Keyword

nonn

Author

Jud McCranie, Jul 04 2000

Status

approved