1702357domain: NAppears in sequencesOdd prime-proof numbers (A118118) not ending in 5.at n=6A143641Numbers ending in 1, 3, 7 or 9 such that changing any one decimal digit produces a composite number.at n=14A186694a(0) = 1; a(n) = a(n-1) + Sum_{k=0..n-1} (1 + k) * k^6 * binomial(n-1,k) * a(k) * a(n-1-k).at n=4A386509