83520

Appears in sequences

• Number of aperiodic necklaces with n labeled beads of 3 colors.at n=5A032322
• Values of n^2 - 1 resulting from A050795.at n=22A050799
• Jordan function J_4(n).at n=16A059377
• Positive numbers which are one less than a perfect square that is also another power.at n=22A062965
• A level 11 weight 5 form.at n=16A065103
• First column of triangle A113463.at n=16A113464
• a(n) = n^4 - 1.at n=16A123865
• Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k consecutive triples of the form (odd,even,odd) and (even,odd,even) (0<=k<=n-2).at n=31A152877
• a(n) = 12*a(n-1) - 28*a(n-2) for n > 1, with a(0)=1, a(1)=12.at n=5A154346
• Positive integers k such that there is no m different from k where both d(k) = d(m) and d(k+1) = d(m+1), where d(k) is the number of positive divisors of k.at n=46A161460
• a(n) = the smallest positive integer that, when written in binary, contains both binary n and binary n^2 as substrings.at n=39A165820
• a(n) = sinh(2*arcsinh(n))^2 = 4*n^2*(n^2 + 1).at n=12A173116
• Numbers with prime factorization pqr^2s^6.at n=16A190474
• Order of Fibonacci group F(n,4) (or 0 if the group is infinite).at n=16A202626
• Numbers n such that n and n^4 are sums of two twin primes.at n=14A212430
• a(n) = sigma(2*n^3) - sigma(n^3).at n=33A225959
• Number of (n+1)X(2+1) 0..3 arrays colored with the maximum plus the upper median minus the lower median minus the minimum of every 2X2 subblock.at n=1A236200
• T(n,k) = Number of (n+1) X (k+1) 0..3 arrays colored with the maximum plus the upper median minus the lower median minus the minimum of every 2 X 2 subblock.at n=4A236202
• Irregular triangular array: row n gives numbers D, each being the discriminant of the minimal polynomial of a quadratic irrational represented by a continued fraction with period an n-tuple of 1s and 3s.at n=35A246921
• Cardinality of the set of equivalence classes of the set X_n of finite integer sequences {x_1 = 0, x_2, ..., x_n} satisfying |x_k - x_{k+1}| = 1, where two such sequences are deemed equivalent if they are permutations of each other.at n=22A254007