[seqfan] Re: A180268
mathar at strw.leidenuniv.nl
Mon Aug 23 23:07:51 CEST 2010
kb> %S A180268 988,1612,3172,5332,7852
kb> %N A180268 Numbers n with property that A000203(n)-n-1 is a prime number
kb> and 2*n+1-A000203(n) is a prime number.
kb> Utterly wrong or some additional condition is missing. I get
This should be something like (found be looking at other contemporary
submissions of the author):
%N A180268 Numbers n>10, not multiples of 6, such that A000203(n)-n-1 and 2*n+1-A000203(n) are prime numbers.
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