81972

Appears in sequences

• a(n) = n * [1 + sum(k=1 to n-1) prime(k)].at n=36A083719
• a(n) is a non-palindromic composite located between twin primes whose reverse, which is less than it, is also located between twin primes.at n=30A103741
• Elements of A103741 that do not terminate in a zero digit.at n=10A103764
• Infinite product of triangle A167271 columns.at n=27A167273
• Total length of self-avoiding walks with n bonds on the simple cubic lattice with additional bridges of length 1.at n=5A259817
• a(n) = 2*n^3 + 9*n^2 + 9*n.at n=33A303609