47700

Appears in sequences

• a(n) = (2*n - 7)*n^2.at n=30A015242
• Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,11.at n=19A064242
• A014486-indices of symmetric binary trees.at n=25A083940
• Numbers with prime factorization pq^2r^2s^2.at n=25A189344
• Number of n X n 0..3 arrays with no element equal the average of immediate neighbors vertically above and horizontally left of it.at n=2A209040
• Number of n X 3 0..3 arrays with no element equal the average of immediate neighbors vertically above and horizontally left of it.at n=2A209042
• T(n,k)=Number of nXk 0..3 arrays with no element equal the average of immediate neighbors vertically above and horizontally left of it.at n=12A209047
• Numbers n such that n^2 is a sum of 2 and also of 4 consecutive primes.at n=40A252066
• a(n) = 6*n*(9*n-5).at n=30A277984
• Number of Lyndon compositions (aperiodic necklaces of positive integers) with sum n and adjacent parts (including the last with the first part) being coprime.at n=21A318745
• Exponential admirable numbers: numbers k such that there is a proper exponential divisor d of k such that esigma(k) - 2*d = 2*k, where esigma is the sum of exponential divisors function (A051377).at n=38A336680
• Exponential unitary abundant numbers: numbers k such that A322857(k) > 2*k.at n=38A383693
• Exponential squarefree exponential abundant numbers: numbers k such that A361174(k) > 2*k.at n=37A383697
• Cubefree exponential abundant numbers: cubefree numbers k for which A051377(k) > 2*k.at n=34A391427