login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A079050 Sum of the digits of LookAndSay(n). 0
2, 3, 4, 5, 6, 7, 8, 9, 10, 3, 3, 5, 6, 7, 8, 9, 10, 11, 12, 4, 5, 4, 7, 8, 9, 10, 11, 12, 13, 5, 6, 7, 5, 9, 10, 11, 12, 13, 14, 6, 7, 8, 9, 6, 11, 12, 13, 14, 15, 7, 8, 9, 10, 11, 7, 13, 14, 15, 16, 8, 9, 10, 11, 12, 13, 8, 15, 16, 17, 9, 10, 11, 12, 13, 14, 15, 9, 17, 18, 10, 11, 12, 13 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..83.

EXAMPLE

LookAndSay(23) = 1213, the sum of whose digits = 7, so a(23) = 7.

MATHEMATICA

lookandsay[n_] := Module[{r, d, f, i, l, k}, r = ""; d = IntegerDigits[n]; While[d != {}, f = First[d]; i = 2; l = Length[d]; While[i <= l && d[[i]] == f, i = i + 1]; k = i - 1; r = r <> ToString[k]; r = r <> ToString[f]; d = Drop[d, k]]; ToExpression[r]]; t = Table[Apply[Plus, IntegerDigits[lookandsay[i]]], {i, 1, 100}]

CROSSREFS

Sequence in context: A043270 A089898 A071785 * A320109 A278062 A254597

Adjacent sequences:  A079047 A079048 A079049 * A079051 A079052 A079053

KEYWORD

base,nonn

AUTHOR

Joseph L. Pe, Feb 02 2003

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 15 03:37 EST 2018. Contains 317225 sequences. (Running on oeis4.)