References to A145174

Least a(n) such that p(n)#*(p(n)#-a(n))-1 and p(n)#*(p(n)#-a(n))+1 are twin primes with p(i)#=i-th primorial
0, 1, 3, 1, 5, 4, 44, 13, 31, 173, 25, 19, 75, 99, 47, 77, 166, 468, 43, 1, 344, 7, 44, 398

2 seqfan posts