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A195437 Triangle formed by: 1 even, 2 odd, 3 even, 4 odd... starting with 2. 7
2, 5, 7, 10, 12, 14, 17, 19, 21, 23, 26, 28, 30, 32, 34, 37, 39, 41, 43, 45, 47, 50, 52, 54, 56, 58, 60, 62, 65, 67, 69, 71, 73, 75, 77, 79, 82, 84, 86, 88, 90, 92, 94, 96, 98, 101, 103, 105, 107, 109, 111, 113, 115, 117, 119, 122, 124, 126, 128, 130, 132 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

A127366(T(n,k)) mod 2 = 1;

T(n,k) mod 2 + A000196(T(n,k)) mod 2 = 1;

complement of A133280.

LINKS

Reinhard Zumkeller, Rows n=0..100 of triangle, flattened

PROG

(Haskell)

a195437 n k = a195437_tabl !! n !! k

a195437_tabl = tail $ g 1 1 [0..] where

   g m j xs = (filter ((== m) . (`mod` 2)) ys) : g (1 - m) (j + 2) xs'

     where (ys, xs') = splitAt j xs

b195437 = bFile' "A195437" (concat $ take 101 a195437_tabl) 0

-- Reinhard Zumkeller, Nov 23 2011 (fixed), Oct 12 2011

CROSSREFS

Cf. A002522 (left edge), A008865 (right edge), A011379 (row sums), A002939 (central terms).

Sequence in context: A188016 A285058 A212446 * A081032 A082845 A003153

Adjacent sequences:  A195434 A195435 A195436 * A195438 A195439 A195440

KEYWORD

nonn,tabl

AUTHOR

Reinhard Zumkeller, Oct 12 2011

STATUS

approved

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Last modified January 22 16:36 EST 2018. Contains 298055 sequences.