1023971

Appears in sequences

• Spiro-tetranacci numbers: a(n) = sum of four previous terms that are nearest when terms arranged in a spiral.at n=39A092369
• Super anti-perfect numbers.at n=9A192275
• Let sigma*_m (n) be result of applying sum of anti-divisors m times to n; call n (m,k)-anti-perfect if sigma*_m (n) = k*n; sequence gives the (2,k)-anti-perfect numbers.at n=33A229860