23546

Appears in sequences

• Integers k > 10577 such that the 'Reverse and Add!' trajectory of k joins the trajectory of 10577.at n=10A063434
• Number of ways of pairing the even squares of the numbers 1 to n with the odd squares of the numbers n+1 to 2n such that each pair sums to a prime. a(1) is defined to be 1.at n=29A077764
• Sum of n-th row of triangle in A082196.at n=31A082199
• a(1) = 1, a(2) = 2; for n >= 2, a(n+1) = a(n) + sum of the unique prime factors of a(n).at n=34A096460
• Number of polyominoes (or square animals) with at most n cells.at n=10A130866
• Position of cubes in the EKG sequence (A064413).at n=28A140418
• a(1) = 1; a(2*n) = prime(n)*a(n), a(2*n+1) = prime(n)*a(n) + a(n+1), where prime(n) is the n-th prime.at n=30A176716
• Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock sum differing from its neighbors horizontally, vertically, diagonally and antidiagonally.at n=2A253290
• Number of (n+1)X(3+1) 0..2 arrays with every 2X2 subblock sum differing from its neighbors horizontally, vertically, diagonally and antidiagonally.at n=1A253291
• T(n,k) = Number of (n+1) X (k+1) 0..2 arrays with every 2 X 2 subblock sum differing from its neighbors horizontally, vertically, diagonally and antidiagonally.at n=7A253294
• T(n,k) = Number of (n+1) X (k+1) 0..2 arrays with every 2 X 2 subblock sum differing from its neighbors horizontally, vertically, diagonally and antidiagonally.at n=8A253294