A105595 Row sums of number triangle A105594.

1, 1, 3, 1, 3, 3, 3, 1, 3, 3, 3, 3, 3, 7, 3, 9, 1, 3, 3, 5, 5, 7, 9, 3, 3, 7, 9, 15, 7, 13, 21, 13, 1, 1, 5, 1, 3, 5, 7, 11, 3, 3, 7, 13, 5, 11, 13, 19, 3, 7, 7, 7, 7, 19, 9, 25, 7, 13, 21, 23, 15, 27, 19, 39, 1, 1, 3, 1, 5, 5, 3, 9, 3, 5, 11, 9, 9, 13, 19, 21, 3, 7, 7, 9, 7, 15, 17, 19, 7, 15, 21

Offset

0,3

Comments

Conjecture : all terms are odd.

Links

Table of n, a(n) for n=0..90.

Formula

a(n)=sum{k=0..n, mod(sum{j=0..n, abs(mu(binomial(n, j)))*mod(binomial(j, k), 2)}, 2)}

Maple

A105595 := proc(n)
    add(A105594(n, k), k=0..n) ;
end proc: # R. J. Mathar, Nov 28 2014

Crossrefs

Cf. A105596.

Sequence in context: A059787 A081325 A132680 * A072219 A173854 A059789

Adjacent sequences: A105592 A105593 A105594 * A105596 A105597 A105598

Keyword

easy,nonn

Author

Paul Barry, Apr 14 2005

Status

approved