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A035489 Main diagonal of the Stolarsky array. 2


%S 1,6,18,39,81,157,309,576,1042,1885,3338,6011,10569,18321,31851,55717,

%T 95320,163580,278208,478807,814329,1374926,2328359,3963782,6656320,

%U 11209356,18772741,31524784,53186481,88750072,148471480,247281057

%N Main diagonal of the Stolarsky array.

%C General solution for the Stolarsky array by row, column is given by the GP-PARI program. Solution for the main diagonal in A035489 is found by setting r=c. If computing large terms for the Stolarsky array, increase the default precision of GP-PARI to accommodate the size. - Randall L. Rathbun (randallr(AT)abac.com), Jan 25 2002

%H N. J. A. Sloane, <a href="/classic.html#WYTH">Classic Sequences</a>

%o (PARI) {Stolarsky(r,c)= tau=(1+sqrt(5))/2; a=floor(r*(1+tau)-tau/2); b=round(a*tau); if(c==1,a, if(c==2,b, for(i=1,c-2,d=a+b; a=b; b=d; ); d))}

%Y See A007064 for references.

%K nonn,easy

%O 0,2

%A _N. J. A. Sloane_.

%E More terms from Randall L. Rathbun (randallr(AT)abac.com), Jan 25 2002

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Last modified August 12 23:19 EDT 2020. Contains 336440 sequences. (Running on oeis4.)