21033

Appears in sequences

• A trace sequence for a Napoleon graph.at n=10A094632
• Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 5-point barb 1,1 1,2 2,2 2,3 3,2 in any orientation.at n=13A146140
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.at n=9A148966
• Numbers n such that sum of cubes of digits of n equals the sum of prime divisors of n.at n=7A217531
• Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime.at n=10A251838
• Expansion of Product_{k>=1} (1 + x^(3*k)) / (1 - x^k).at n=32A266648
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 41", based on the 5-celled von Neumann neighborhood.at n=32A269874
• Number of n-bead asymmetric bracelets with exactly 3 different colored beads.at n=11A326660
• a(n) = floor(Sum_{k=n^4..(n+1)^4} k^(1/4)).at n=8A374489