128573

Appears in sequences

• Composite squarefree numbers n such that p(i)-3 divides n+3, where p(i) are the prime factors of n.at n=11A225703
• Number of 3 X n integer matrices (m_{i,j}) such that m_{1,1}=0, m_{3,n}=2, and all rows, columns, and falling diagonals are (weakly) monotonic without jumps of 2.at n=17A323967
• Products p*q*r of three distinct primes such that s=(p*q) mod r, t=(p*r) mod q and u=(q*r) mod p, and s+t+u are all prime.at n=28A338705