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A106345 Diagonal sums of number triangle A106344. 1
1, 0, 1, 1, 1, 0, 2, 1, 2, 1, 1, 1, 2, 0, 3, 2, 3, 1, 3, 2, 2, 1, 2, 1, 3, 1, 2, 2, 3, 0, 5, 3, 5, 2, 4, 3, 4, 1, 5, 3, 4, 2, 3, 2, 3, 1, 3, 2, 4, 1, 4, 3, 3, 1, 4, 2, 5, 2, 3, 3, 5, 0, 8, 5, 8, 3, 7, 5, 6, 2, 7, 4, 7, 3, 5, 4, 6, 1, 8, 5, 7, 3, 6, 4, 5, 2, 5, 3, 5, 2, 4, 3, 4, 1, 5, 3, 6, 2, 5, 4, 5, 1, 7 (list; graph; refs; listen; history; internal format)
OFFSET

0,7

FORMULA

a(n)=sum{k=0..floor(n/2), (binomial(k, n-2k) mod 2)}

CROSSREFS

Cf. A002487.

Sequence in context: A030338 A159847 A144477 * A194636 A081729 A080215

Adjacent sequences:  A106342 A106343 A106344 * A106346 A106347 A106348

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Apr 29 2005

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Last modified February 13 15:00 EST 2012. Contains 205519 sequences.