

A098350


Multiplication table of the primes read by antidiagonals.


18



4, 6, 6, 10, 9, 10, 14, 15, 15, 14, 22, 21, 25, 21, 22, 26, 33, 35, 35, 33, 26, 34, 39, 55, 49, 55, 39, 34, 38, 51, 65, 77, 77, 65, 51, 38, 46, 57, 85, 91, 121, 91, 85, 57, 46, 58, 69, 95, 119, 143, 143, 119, 95, 69, 58, 62, 87, 115, 133, 187, 169, 187, 133, 115, 87, 62
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OFFSET

1,1


COMMENTS

Contains only semiprimes (A001358).
sum{n>=1, k>=1} 1/T(n,k)^s = P(s)^2, where P is the Prime Zeta Function.  Enrique Pérez Herrero, Jun 24 2012


LINKS



FORMULA

T(n,k) = A003991(prime(n),prime(k)).


EXAMPLE

4, 6, 10, 14, 22, 26, 34, 38, 46, 58,...
6, 9, 15, 21, 33, 39, 51, 57, 69, 87,...
10, 15, 25, 35, 55, 65, 85, 95,115,145,...
14, 21, 35, 49, 77, 91,119,133,161,203,...
22, 33, 55, 77,121,143,187,209,253,319,...
26, 39, 65, 91,143,169,221,247,299,377,...
34, 51, 85,119,187,221,289,323,391,493,...


CROSSREFS



KEYWORD



AUTHOR

Douglas Stones (dssto1(AT)student.monash.edu.au), Sep 04 2004


STATUS

approved



