18733

Appears in sequences

• Crystal ball sequence for D_5 lattice.at n=5A008356
• a(n) = n*(n+1)*(n+2)*(n+3)*(1+3*n+n^2)/120.at n=9A101094
• Indices of primes in sequence defined by A(0) = 59, A(n) = 10*A(n-1) - 21 for n > 0.at n=25A101583
• Numbers n such that 6*10^n + 5*R_n - 4 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=18A103038
• Square array, read by antidiagonals, where row n equals the crystal ball sequence for D_n lattice.at n=60A108553
• Main diagonal of square array A108553, in which row n equals the crystal ball sequence for D_n lattice.at n=5A108554
• a(n) = a(n-2)+a(n-3)+a(n-4)+a(n-5)+a(n-6)+2*a(n-7)+a(n-8).at n=25A109540
• 1/16 the number of (n+1) X 3 0..3 arrays with all 2 X 2 subblocks having the same four values.at n=11A184032
• Number of arrays of n integers in -2..2 with sum zero and equal numbers of elements greater than zero and less than zero.at n=8A201805
• T(n,k)=Number of arrays of n integers in -k..k with sum zero and equal numbers of elements greater than zero and less than zero.at n=43A201811
• Number of 2 X n arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 2 X n array.at n=14A219579
• Binomial(n-1,3)+3*binomial(n-1,4)+6*binomial(n-1,5)+5*binomial(n-1,6).at n=13A235593
• Square array T(n,k), n>=0, k>=0, read by antidiagonals, where T(n,k) is the constant term in the expansion of (1 + x_1 + x_2 + ... + x_n + 1/x_1 + 1/x_2 + ... + 1/x_n)^k.at n=57A328718
• Numbers k such that a nonzero proper substring of the concatenation, in decreasing order, of the prime factors of k (without multiplicity) is divisible by k.at n=5A379137