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Search: id:A066823
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| A066823 |
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Primes in the main diagonal of the Stolarsky array (cf. A035506). |
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+0
1
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| 157, 6011, 55717, 74636904300223, 1524920857037139836753, 533561095785570791522387803, 960826779344998235261901369163166807780807
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Corresponding row/column numbers of the array are 6, 12, 16, 57, 91, 117, 189, 597, 707, 1729, 3933, (through 5000). The values in row/column 597, 707, ... are strong pseudo-primes.
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PROGRAM
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(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))
for(x=1, 5000, if(isprime(p=Stolarsky(x, x)), print1(p, ", ")))
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CROSSREFS
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Cf. A035506.
Sequence in context: A142766 A038493 A078964 this_sequence A074220 A015265 A048930
Adjacent sequences: A066820 A066821 A066822 this_sequence A066824 A066825 A066826
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KEYWORD
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easy,nonn
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AUTHOR
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Randall L. Rathbun, Jan 25 2002
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EXTENSIONS
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Edited by Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), May 26 2003
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