1921920

Appears in sequences

• a(n) = 12*(n+1)*binomial(n+3,9).at n=7A027794
• 4-quantum transitions in systems of N>=4 spin 1/2 particles, in columns by combination indices.at n=33A213346
• 8-quantum transitions in systems of N >= 8 spin 1/2 particles, in columns by combination indices.at n=22A213350
• Average of twin prime pairs n having their decimal expansion of the form abcabc or abcabc0 such that n contains three twin primes as divisors.at n=14A235716
• Largest FDH number of a strict integer partition of n.at n=39A299758
• Semi-unitary highly composite numbers: where the number of semi-unitary divisors of n (A322483) increases to a record.at n=16A322484
• Numbers m such that sigma(m)/esigma(m) > sigma(k)/esigma(k) for all k < m, where sigma(m) is the sum of divisors of m (A000203) and esigma(m) is the sum of exponential divisors of m (A051377).at n=13A335396
• Positions of records in A227872, i.e., integers whose number of odious divisors sets a new record.at n=36A355969
• Terms k in A025487 such that k-1 and k+1 are twin primes.at n=36A375197
• Numbers that have a record number of infinitary divisors that are exponentially odd numbers (A268335).at n=16A377710
• Numbers that have a record number of (1+phi)-divisors (A061389).at n=22A377711
• Numbers that set records in A376567.at n=29A378630
• Numbers that set records in A377071.at n=25A378631
• Numbers that set records in A378181.at n=28A378632
• Numbers that set records in A113901.at n=30A380146
• Smallest k for which the number of divisors d of k such that A000005(d) = A000005(k/d) is equal to n.at n=30A391603