63601

Properties

Appears in sequences

• Number of 4-colored labeled graphs on n nodes, divided by 4.at n=4A000686
• Denominators of continued fraction convergents to sqrt(117).at n=10A041213
• Primes p such that there exist primes p'<p"<p"'<p""<p such that the concatenation of any two among the {p,...,p""} is prime.at n=16A139005
• P_4(2n+1), the Legendre polynomial of order 4 at 2n+1.at n=5A144124
• Primes of the form P_4(n) where P_4(n) is the Legendre polynomial of order 4 at n.at n=1A144125
• Primes in A005891 = Centered pentagonal numbers: (5n^2 + 5n + 2)/2.at n=25A145838
• Numerator of Hermite(n, 7/20).at n=4A159659
• Number of permutations of 1..n with displacements restricted to {-5,-4,-3,-1,0,2}.at n=16A189587
• Number of n X 2 nonnegative integer arrays with upper left 0 and every value within 3 of its king move distance from the upper left and every value increasing by 0 or 1 with every step right, diagonally se or down.at n=30A252932
• a(n) = numerator of Sum_{d|n} sigma(d)/pod(d) where sigma(k) = the sum of the divisors of k (A000203) and pod(k) = the product of the divisors of k (A007955).at n=29A324363
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of 1/sqrt(1 - 2*(2*k+1)*x + x^2).at n=49A335333
• Prime numbersat n=6375