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A070951 Number of 0's in n-th row of triangle in A070950. 5
0, 0, 2, 1, 5, 2, 8, 3, 10, 7, 10, 9, 13, 8, 16, 9, 18, 16, 17, 15, 20, 20, 22, 19, 23, 24, 27, 22, 27, 25, 30, 24, 39, 28, 40, 25, 41, 31, 39, 34, 34, 42, 40, 38, 51, 36, 51, 44, 53, 46, 58, 44, 53, 47, 60, 46, 56, 55, 61, 50, 60, 53, 66, 49, 65, 75, 68, 66, 68, 72 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

a(n) + A070952(n) = 2*n + 1. - Reinhard Zumkeller, Jun 07 2013

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

MATHEMATICA

steps = 100; Count[#, 0]& /@ MapIndexed[ Take[#1, {steps - First[#2] + 2, steps + First[#2]}]&, CellularAutomaton[30, {{1}, 0}, steps]] (* Jean-Fran├žois Alcover, Oct 07 2013 *)

PROG

(Haskell)

a070951 = length . filter (== 0) . a070950_row

-- Reinhard Zumkeller, Jun 06 2013

CROSSREFS

Sequence in context: A142721 A152992 A185727 * A076937 A014682 A111361

Adjacent sequences:  A070948 A070949 A070950 * A070952 A070953 A070954

KEYWORD

nonn,easy,nice

AUTHOR

N. J. A. Sloane, May 19 2002

EXTENSIONS

More terms from Hans Havermann, May 26 2002

STATUS

approved

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Last modified December 18 21:27 EST 2014. Contains 252174 sequences.