A065577 Number of Goldbach partitions of 10^n? More terms?

[David Wilson]

I wrote a C++ program using sieve method and calculated

a(7) = 38807
a(8) = 291400
a(9) = 2274205
a(10) = 18200488

a(7), a(8) and a(9) agree with previous calculations.

However, Zak Seidov gave

However, my a(10) = 18200487.

So now I have to go root out the discrepancy. I am going to have my computer 
generate a file of all the partitions of 10^10 and do an independent check 
of the results, and hopefully uncover a problem in my program.