51489

Appears in sequences

• a(n) = -a(n-1) - a(n-2) + a(n-3), a(0)=0, a(1)=0, a(2)=1.at n=39A057597
• Numbers k such that 4*10^k + 87 is prime.at n=29A273097
• Numbers that are divisible by the product of their digits in primorial base representation.at n=29A341433