58993

Appears in sequences

• The a(n)-th composite number is 2^n.at n=14A065891
• Duplicate of A065891.at n=14A073801
• Number of '5' digits in the set of all numbers from 0 to A014824(n) = Sum_{i=1..n} i*10^(n-i) = (0, 1, 12, 123, 1234, 12345, ...).at n=6A277835
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = (-1)^n * Sum_{j=0..n} (-k*j)^j * binomial(n,j).at n=40A362019
• a(n) = (-1)^n * Sum_{k=0..n} (-n*k)^k * binomial(n,k).at n=4A362862
• Number of compositions of 6*n-1 into parts 5 and 6.at n=16A373961
• a(n) = Sum_{k=0..floor(2*n/5)} binomial(k+1,2*n-5*k).at n=48A390020
• a(n) = Sum_{k=0..floor(3*n/5)} binomial(k+1,3*n-5*k).at n=32A391843