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A087755 Triangle formed by reading triangle of Stirling numbers of the first kind (A008275) mod 2. +0
2
1, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1 (list; table; graph; listen)
OFFSET

1,1

COMMENT

Essentially also parity of Mitrinovic's triangles A049458, A049460, A051339, A051380.

FORMULA

T(n, k) = A087748(n, k) = A008275(n, k) mod 2 = A047999([n/2], k-[(n+1)/2]) = T(n-2, k-2) XOR T(n-2, k-1) with T(1, 1) = T(2, 1) = T(2, 2) = 1; T(2n, k) = T(2n-1, k-1) XOR T(2n-1, k); T(2n+1, k) = T(2n, k-1). - Henry Bottomley (se16(AT)btinternet.com), Dec 01 2003

CROSSREFS

Adjacent sequences: A087752 A087753 A087754 this_sequence A087756 A087757 A087758

Sequence in context: A130304 A118274 A080909 this_sequence A050072 A131309 A106510

KEYWORD

easy,nonn,tabl

AUTHOR

DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Oct 02 2003

EXTENSIONS

Edited and extended by Henry Bottomley (se16(AT)btinternet.com), Dec 01 2003

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Last modified October 7 08:31 EDT 2008. Contains 144667 sequences.


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