26924

Appears in sequences

• Numbers n such that 1 - Sum{k=1..n/2} A001223(2k-1)*(-1)^k = 0.at n=21A130643
• Numbers n such that 1 - S(n) = 0, where S(n) = (S(n-1) + A000040(n))*(-1)^n; S(0)=0, n=>1.at n=28A131197
• Number of 4-tuples (w,x,y,z) with all terms in {1,...,n} and w*x >= 2*y*z.at n=17A211809
• Number of (n+2) X (1+2) 0..1 arrays with every 2 X 2 and 3 X 3 subblock diagonal maximum minus antidiagonal minimum nondecreasing horizontally and vertically.at n=34A253503
• Numbers k such that w(k-2), w(k-1), and w(k) are all odd, where w is A336957.at n=10A338070