242730

Appears in sequences

• Larger of unitary amicable pair.at n=10A002953
• Unitary amicable numbers.at n=20A063991
• Numbers k such that k-17, k-1, k+1 and k+17 are consecutive primes.at n=8A262176
• List of pairs of unitary amicable numbers (m, n) with record value of m/n.at n=5A292019
• Three-column table read by rows: Triples that have the same value of phi, sigma, and tau.at n=16A322679
• Three-column table read by rows: Primitive distinct triples that have the same value of phi, sigma, and tau.at n=16A322689
• Numbers of squares and rectangles of all sizes in 3*n*(n+1)/2-ominoes in form of three-quarters of Aztec diamonds.at n=29A338996