28413

Appears in sequences

• Numbers k that divide the (left) concatenation of all numbers <= k written in base 13 (most significant digit on left).at n=25A029482
• Reduced denominators of the coefficients in a series expansion for Gamma[x].at n=39A054380
• Consider all Pythagorean triples (X,X+7,Z); sequence gives X values.at n=16A076296
• Number of non-isomorphic maximal independent sets of the n-cycle graph.at n=52A127685
• Smallest number k such that M(n)^2-k*M(n)+1 is prime with M(n)= Mersenne primes =A000668(n).at n=20A139425
• Triangle T(n,k), read by rows, given by (1,2,2,3,3,4,4,5,5,6,6,...) DELTA (1,0,1,0,1,0,1,0,1,0,1,0,1,...) where DELTA is the operator defined in A084938.at n=31A200659
• The hyper-Wiener index of the dendrimer D_2[n], defined pictorially in the A. R. Ashrafi et al. reference.at n=1A224432
• Odd numbers n such that the sum of the binary digits of n and n^2 both equal 12.at n=34A261593