25350

Appears in sequences

• Number of aperiodic binary necklaces of length n with no subsequence 00, excluding the necklace "0".at n=27A006206
• Numbers k such that 75*2^k+1 is prime.at n=42A032387
• Number of orbits of length n under the map whose periodic points are counted by A001350.at n=27A060280
• Exponents in expansion of constant A065463 as Product_{n>1} zeta(n)^(-a(n)).at n=27A065490
• Partial sums of n 3-spaced triangular numbers beginning with t(3), e.g., a(2) = t(3)+t(6) = 6+21 = 27.at n=24A085788
• Fifth column of the (1,4)-Pascal triangle A095666.at n=23A095667
• Numbers n that are the hypotenuse of exactly 12 distinct integer-sided right triangles, i.e., n^2 can be written as a sum of two squares in 12 ways.at n=8A097226
• Numbers k such that 4*k-1, 8*k-1, 16*k-1 and 32*k-1 are all primes.at n=14A101794
• Integer part of the area of consecutive prime sided tetragons with one right angle.at n=37A105270
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, 0), (0, 1, -1), (1, 0, 0)}.at n=12A148016
• Areas A of the triangles such that A, the sides and the three altitudes are integers.at n=29A210643
• a(n) = Product_{k=1..n} (169 - 13/k).at n=2A216788
• Numbers A055744(n) such that for any k < n, A055744(k) and A055744(n) do not have all their prime factors in common.at n=16A256431
• Differences of the increasing arithmetic progression a^2+a, b^2+b, c^2+c, where b = 5*a+2, c = 7*a+3 and a >= 0.at n=32A260955
• Smallest number with middle divisors whose distance to the next number with middle divisors is n.at n=17A280295
• Triangle read by rows: T(n,k) (0 <= k <= n) = k!*(Stirling2(n,k)+(k+1)*Stirling2(n,k+1))^2.at n=18A334689
• G.f. A(x) satisfies: A(x) = x^2 + x^3 * exp(A(x) + A(x^2)/2 + A(x^3)/3 + A(x^4)/4 + ...).at n=30A346030
• Numbers k for which A327500(k) <> A351946(k).at n=47A351947
• a(n) is the number of integer triples (x,y,z) satisfying a system of linear inequalities and congruences specified in the comments.at n=37A370349