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A226481 Table read by rows: run lengths in rows of A070950. 2
1, 3, 2, 2, 1, 2, 1, 4, 2, 2, 1, 3, 1, 2, 1, 4, 1, 3, 2, 2, 1, 4, 1, 2, 1, 2, 1, 4, 2, 6, 2, 2, 1, 3, 3, 5, 1, 2, 1, 4, 1, 2, 2, 1, 3, 3, 2, 2, 1, 4, 1, 1, 4, 1, 2, 2, 1, 2, 1, 4, 2, 2, 1, 1, 4, 1, 1, 4, 2, 2, 1, 3, 3, 2, 2, 2, 2, 1, 1, 3, 1, 2, 1, 4, 1, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

T(n,2*k) = numbers of consecutive ones in row n of A070950;

T(n,2*k+1) = numbers of consecutive zeros in row n of A070950;

sum(T(n,k): k = 0..A226482(n)-1) = 2*n+1.

LINKS

Reinhard Zumkeller, Rows n = 0..150 of triangle, flattened

Eric Weisstein's World of Mathematics, Rule 30

Index entries for sequences related to cellular automata

EXAMPLE

.             Initial rows               A070950, terms moved together

.  0:  [1]                                             1

.  1:  [3]                                            111

.  2:  [2,2,1]                                       11001

.  3:  [2,1,4]                                      1101111

.  4:  [2,2,1,3,1]                                 110010001

.  5:  [2,1,4,1,3]                                11011110111

.  6:  [2,2,1,4,1,2,1]                           1100100001001

.  7:  [2,1,4,2,6]                              110111100111111

.  8:  [2,2,1,3,3,5,1]                         11001000111000001

.  9:  [2,1,4,1,2,2,1,3,3]                    1101111011001000111

. 10:  [2,2,1,4,1,1,4,1,2,2,1]               110010000101111011001

. 11:  [2,1,4,2,2,1,1,4,1,1,4],             11011110011010000101111

. 12:  [2,2,1,3,3,2,2,2,2,1,1,3,1]         1100100011100110011010001

. 13:  [2,1,4,1,2,2,3,1,3,2,2,1,3]        110111101100111011100110111

. 14:  [2,2,1,4,1,1,3,3,1,2,3,2,1,2,1]   11001000010111000100111001001

. 15:  [2,1,4,2,2,1,1,2,1,1,5,2,7]      1101111001101001011111001111111

. 16:  [2,2,1,3,3,2,4,1,1,4,3,6,1]     110010001110011110100001110000001 .

PROG

(Haskell)

import Data.List (group)

a226481 n k = a226481_tabf !! n !! k

a226481_row n = a226481_tabf !! n

a226481_tabf = map (map length . group) a070950_tabf

CROSSREFS

Cf. A226482 (row lengths), A005408 (row sums).

Sequence in context: A090341 A251092 A175632 * A088435 A328630 A171900

Adjacent sequences:  A226478 A226479 A226480 * A226482 A226483 A226484

KEYWORD

nonn,tabf

AUTHOR

Reinhard Zumkeller, Jun 09 2013

STATUS

approved

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Last modified June 20 12:57 EDT 2021. Contains 345164 sequences. (Running on oeis4.)