38897

Appears in sequences

• a(n) = a(n-1) + floor(a(n-2)/2) with a(0)=1, a(1)=2.at n=34A064324
• Number of quadruples [i,j,k,l] with all entries between 1 and n such that gcd(i,j) = gcd(k,l).at n=16A124162
• Numbers m such that k = m*23^2 divides 3^(k-1) - 2^(k-1).at n=18A130058
• G.f.: Sum_{n>=1} x^n * (1+x)^prime(n).at n=12A227234
• Numbers k such that (4*10^k + 143) / 3 is prime.at n=24A276846
• Numbers k such that 3^(k-1) == 2^(k-1) !== 1 (mod k).at n=35A285300
• Number of vertices in regular n-gon after 2 generations of mitosis.at n=23A349967
• Table read by descending antidiagonals: T(k,n) (k >= 0, n>= 1) is number of ways to (k+2)-color a 3 X n grid ignoring the variations of two colors.at n=25A355881