A208834 Look and say sequence starting with 373.

373, 131713, 111311171113, 311331173113, 1321232117132113, 1113121112131221171113122113, 311311123112111311222117311311222113, 132113311213211231132132211713211321322113

Offset

1,1

Comments

The first four terms are prime, thus the first three terms are members of A056815.

The fifth term is 17 * 18131 * 4286555419.

References

David Wells, Prime Numbers: The Most Mysterious Figures in Math. Hoboken, New Jersey: John Wiley & Sons (2005): p. 41

Links

Table of n, a(n) for n=1..8.

Chris Caldwell, Prime Curios! 373, The Prime Pages

Mathematica

(* First run one of the programs from A056815 to define the LookAndSay function *) NestList[LookAndSay, 373, 10]

Crossrefs

Cf. A045918.

Sequence in context: A134161 A168168 A226850 * A171216 A108844 A025336

Adjacent sequences: A208831 A208832 A208833 * A208835 A208836 A208837

Keyword

nonn,easy,base

Author

Alonso del Arte, Mar 01 2012

Status

approved