31005

Appears in sequences

• [ (3rd elementary symmetric function of 3,4,...,n+4)/(3+4+...+n+4) ].at n=25A024191
• Number of Dyck paths of semilength n having no ascents of length 1 that start at an even level.at n=12A102406
• Numbers k such that the k-th centered pentagonal number A005891(k) = (5k^2 + 5k + 2)/2 is a square.at n=6A129556
• Numbers such that the digital sum base 2 and the digital sum base 3 and the digital sum base 10 all are equal.at n=32A135120
• Numbers n such that prime[(n + 1)^2] - prime[n^2] is a perfect square.at n=31A145290
• Run length of the n-th run of Fibonacci composites.at n=29A182600
• Number of length n 1..(5+1) arrays with every leading partial sum divisible by 2, 3 or 5.at n=6A254824
• T(n,k)=Number of length n 1..(k+1) arrays with every leading partial sum divisible by 2, 3 or 5.at n=61A254827
• Number of length 7 1..(n+1) arrays with every leading partial sum divisible by 2, 3 or 5.at n=4A254834
• Number of subsets of {1..n} of which every subset has a different sum.at n=27A325864