

A035489


Main diagonal of the Stolarsky array.


2



1, 6, 18, 39, 81, 157, 309, 576, 1042, 1885, 3338, 6011, 10569, 18321, 31851, 55717, 95320, 163580, 278208, 478807, 814329, 1374926, 2328359, 3963782, 6656320, 11209356, 18772741, 31524784, 53186481, 88750072, 148471480, 247281057
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OFFSET

0,2


COMMENTS

General solution for the Stolarsky array by row, column is given by the GPPARI 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 GPPARI to accommodate the size.  Randall L. Rathbun (randallr(AT)abac.com), Jan 25 2002


LINKS

Table of n, a(n) for n=0..31.
N. J. A. Sloane, Classic Sequences


PROG

(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, c2, d=a+b; a=b; b=d; ); d))}


CROSSREFS

See A007064 for references.
Sequence in context: A272453 A271252 A271541 * A219143 A122061 A299256
Adjacent sequences: A035486 A035487 A035488 * A035490 A035491 A035492


KEYWORD

nonn,easy


AUTHOR

N. J. A. Sloane.


EXTENSIONS

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


STATUS

approved



