OFFSET
1,1
COMMENTS
A006751(n) = concatenation of n-th row. - Reinhard Zumkeller, Aug 09 2012
From Jean-Christophe Hervé, May 07 2013: (Start)
REFERENCES
J. H. Conway, The weird and wonderful chemistry of audioactive decay, in T. M. Cover and Gopinath, eds., Open Problems in Communication and Computation, Springer, NY 1987, pp. 173-188.
LINKS
Reinhard Zumkeller, Rows n = 1..25 of triangle, flattened
Eric W. Weisstein, MathWorld: Look and Say Sequence
Wikipedia, Look-and-say sequence
PROG
(Haskell) see Watkins link, p. 3.
import Data.List (group)
a088203 n k = a088203_tabf !! (n-1) !! (k-1)
a088203_row n = a088203_tabf !! (n-1)
a088203_tabf = iterate
(concat . map (\xs -> [length xs, head xs]) . group) [2]
-- Reinhard Zumkeller, Aug 09 2012
CROSSREFS
KEYWORD
nonn,easy,tabf
AUTHOR
Paul D. Hanna, Sep 22 2003
STATUS
approved