28131

Appears in sequences

• Number of upper Wythoff primes (A095281) in range ]2^n,2^(n+1)].at n=19A095291
• Semiprimes in A056106.at n=32A113524
• Number of (n+4) X 11 0..1 matrices with each 5 X 5 subblock idempotent.at n=14A224689
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 305", based on the 5-celled von Neumann neighborhood.at n=28A287545
• G.f.: Sum_{n>=0} ( Product_{k=1..n} 1 + x*(1+x)^k ) / 2^(n+1).at n=8A338793
• The number of lit cells in weakly decreasing partitions of n when light shines from the north west. Here partitions are represented from left to right by columns of cells.at n=25A366157