34151

Appears in sequences

• Numbers k such that j(k)*phi(k) = sigma(phi(k)), j(k) = A033831(k).at n=12A033856
• Least multiple of 2n-1 ending in prime(n), 0 if no such number exists.at n=35A114780
• a(n) = 25*n^2 - 2*n.at n=36A154376
• Principal diagonal of the convolution array A213771.at n=25A213772
• Number of n X n 0..2 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1) X (n+1) 0..2 array without adjacent equal elements in the latter.at n=3A229513
• Number of n X 4 0..2 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1) X 5 0..2 array without adjacent equal elements in the latter.at n=3A229517
• T(n,k) = number of n X k 0..2 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1) X (k+1) 0..2 array without adjacent equal elements in the latter.at n=24A229521
• a(n) = Sum_{i=0..n} digsum_5(i)^4, where digsum_5(i) = A053824(i).at n=45A231671
• Number of unlabeled rooted trees with n nodes such that every branch of the root has the same number of nodes.at n=14A298537