19130

Appears in sequences

• Interprimes which are of the form s*prime, s=10.at n=37A075285
• Number of noncongruent n-dimensional integer-sided simplices with diameter 3.at n=8A097128
• Numbers n such that sigma(n)=2n-phi(phi(n)).at n=16A110073
• Number of steps required for a certain algorithm for producing all permutations of n letters.at n=4A135848
• Final number of terms obtained with Euler's recurrence formula when computing the sum of divisors of n.at n=18A190138
• Number of standard Young tableaux with n cells and 6 as last value in the first row.at n=7A245004
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 825", based on the 5-celled von Neumann neighborhood.at n=25A273581
• Number of nX5 0..1 arrays with every element equal to 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=6A301820
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=61A301823
• Number of 7Xn 0..1 arrays with every element equal to 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=4A301828