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 A135090 Array read by antidiagonals: T(n,k) = Knuth's Fibonacci (or circle) product of n and k ("n o k"), n >= 0, k >= 0. 1

%I

%S 0,0,0,0,3,0,0,5,5,0,0,8,8,8,0,0,11,13,13,11,0,0,13,18,21,18,13,0,0,

%T 16,21,29,29,21,16,0,0,18,26,34,40,34,26,18,0,0,21,29,42,47,47,42,29,

%U 21,0,0,24,34,47,58,55,58,47,34,24,0,0,26,39,55,65,68,68,65,55,39,26,0,0,29,42,63,76,76,84,76,76,63,42,29,0,0,32,47

%N Array read by antidiagonals: T(n,k) = Knuth's Fibonacci (or circle) product of n and k ("n o k"), n >= 0, k >= 0.

%C This is a variant of A101330. See that entry for much more information.

%e Array begins:

%e ____k__0___1___2___3___4____5____6____7____8____9

%e __n______________________________________________

%e __0____0___0___0___0___0____0____0____0____0____0

%e __1____0___3___5___8__11___13___16___18___21___24

%e __2____0___5___8__13__18___21___26___29___34___39

%e __3____0___8__13__21__29___34___42___47___55___63

%e __4____0__11__18__29__40___47___58___65___76___87

%e __5____0__13__21__34__47___55___68___76___89__102

%e __6____0__16__26__42__58___68___84___94__110__126

%e __7____0__18__29__47__65___76___94__105__123__141

%e __8____0__21__34__55__76___89__110__123__144__165

%e __9____0__24__39__63__87__102__126__141__165__189

%K nonn,tabl

%O 0,5

%A _N. J. A. Sloane_, May 17 2008

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