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A282551 Dimension of the kernel of the modulo 2 Wendt matrix of dimension n. 0
0, 0, 2, 0, 0, 4, 6, 0, 2, 0, 0, 8, 0, 12, 14, 0, 0, 4, 0, 0, 6, 0, 0, 16, 0, 0, 2, 24, 0, 28, 30, 0, 2, 0, 6, 8, 0, 0, 2, 0, 0, 12, 0, 0, 14, 0, 0, 32, 6, 0, 2, 0, 0, 4, 0, 48, 2, 0, 0, 56, 0, 60, 62, 0, 0, 4, 0, 0, 0, 12, 0, 16, 0, 0, 14, 0, 0, 4, 0, 0, 0, 0, 0, 24 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..84.

Jonathan Chappelon, Periodic balanced binary triangles, arXiv:1702.03236 [math.CO], 2016. See Table 1.

MATHEMATICA

a[n_] := Table[Mod[Binomial[n, Abs[i-j]], 2], {i, n}, {j, n}] // NullSpace // Length;

Array[a, 100] (* Jean-Fran├žois Alcover, Sep 28 2018 *)

PROG

(PARI) a(n) = matsize(matker(matrix(n, n, i, j, binomial(n, abs(i-j)) % 2)))[2];

CROSSREFS

Sequence in context: A213370 A244138 A284611 * A056676 A098699 A021837

Adjacent sequences:  A282548 A282549 A282550 * A282552 A282553 A282554

KEYWORD

nonn

AUTHOR

Michel Marcus, Feb 18 2017

STATUS

approved

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Last modified November 18 19:59 EST 2019. Contains 329288 sequences. (Running on oeis4.)