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A249040
Number of even terms in first n terms of A249039.
3
0, 1, 2, 2, 2, 2, 3, 3, 4, 5, 6, 7, 7, 8, 9, 9, 9, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 12, 12, 13, 14, 14, 14, 15, 15, 16, 17, 18, 18, 19, 20, 21, 22, 23, 24, 24, 25, 26, 27, 28, 28, 29, 30, 30, 30, 31, 31, 32, 33, 34, 34, 35, 36, 36, 36, 37, 37, 37, 37, 38, 38, 39, 40, 40, 40, 41, 41
OFFSET
1,3
LINKS
FORMULA
For n > 1: a(n) = a(n-1) + 1 - A249039(n) mod 2. - Reinhard Zumkeller, Nov 11 2014
MAPLE
See A249039.
PROG
(Haskell)
a249040 n = a249040_list !! (n-1)
a249040_list = tail $ scanl (\i j -> i + 1 - mod j 2) 0 a249039_list
-- Reinhard Zumkeller, Nov 11 2014
CROSSREFS
Sequence in context: A140436 A236916 A029083 * A153683 A275882 A005139
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Oct 26 2014
STATUS
approved