26644

Appears in sequences

• Powers of fourth root of 23 rounded down.at n=13A018111
• Every run of digits of n in base 3 has length 2.at n=33A033001
• G.f.: A(x) = exp( Sum_{n>=1} A000172(n)*x^n/n ) where Franel number A000172(n) = Sum_{k=0..n} C(n,k)^3.at n=7A166990
• a(n) = 4*(5*n^2 - 5*n + 1).at n=36A193448
• Number of closed binary words of length n.at n=18A226452
• Number of n X n 0..2 arrays with no element x(i,j) adjacent to value 2-x(i,j) horizontally, vertically or antidiagonally.at n=4A232934
• Number of nX5 0..2 arrays with no element x(i,j) adjacent to value 2-x(i,j) horizontally, vertically or antidiagonally.at n=4A232938
• T(n,k)=Number of nXk 0..2 arrays with no element x(i,j) adjacent to value 2-x(i,j) horizontally, vertically or antidiagonally.at n=40A232941
• Number of (2+1)X(n+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically.at n=10A253699
• Number of length 3 1..(n+1) arrays with every leading partial sum divisible by 2, 3 or 5.at n=39A254830
• Number of n-digit left- or right-truncatable primes with no consecutive zero digits.at n=39A346662
• a(n) = 2^n*(n + 2) + (n - 7)*n/2 - 2.at n=10A362526