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A062296
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Number of entries in n-th row of Pascal's triangle divisible by 3.
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4
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0, 0, 0, 2, 1, 0, 4, 2, 0, 8, 7, 6, 9, 6, 3, 10, 5, 0, 16, 14, 12, 16, 11, 6, 16, 8, 0, 26, 25, 24, 27, 24, 21, 28, 23, 18, 33, 30, 27, 32, 25, 18, 31, 20, 9, 40, 35, 30, 37, 26, 15, 34, 17, 0, 52, 50, 48, 52, 47, 42, 52, 44, 36, 58, 53, 48, 55, 44, 33, 52, 35, 18, 64, 56, 48, 58, 41
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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FORMULA
| a(n) + A006047(n) = n + 1 so a(n) = n + 1 - A006047(n)
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EXAMPLE
| When n=3 the row is 1,3,3,1 so a(3) = 2.
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MAPLE
| p:=proc(n) local ct, k: ct:=0: for k from 0 to n do if binomial(n, k) mod 3 = 0 then else ct:=ct+1 fi od: end: seq(n+1-p(n), n=0..83); (Deutsch)
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CROSSREFS
| Cf. A006047.
Sequence in context: A122792 A139136 A138002 * A140649 A091453 A062173
Adjacent sequences: A062293 A062294 A062295 * A062297 A062298 A062299
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KEYWORD
| nonn
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AUTHOR
| Ahmed Fares (ahmedfares(AT)my-deja.com), Jul 02 2001
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EXTENSIONS
| More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Feb 03 2005
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