21414

Appears in sequences

• Number of identity bracelets of n beads of 3 colors.at n=11A032240
• Numbers having four 3's in base 9.at n=5A043468
• Sum of squares of digits of n is equal to the largest prime factor of n reversed, where the largest prime factor is not a palindrome.at n=32A074303
• The even composites c such that c=q*g*j*y and q+g=j*y where q,g,j,y are primes.at n=35A167690
• G.f. satisfies A(x) = (1 + x*A(x)^2)*(1 + x^2*A(x)^3).at n=8A200075
• Number of nonnegative integer arrays of length 2n+5 with new values 0 upwards introduced in order, no three adjacent elements all unequal, and containing the value n+1.at n=18A211850
• Number of (n+2)X(2+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010011.at n=9A260761
• Intersection of A003052 and A283002.at n=32A283003
• Number of 5-cycles in the n-triangular honeycomb obtuse knight graph.at n=28A290391
• Numbers k such that 3*10^k + 13 is prime.at n=18A290473
• Second differences of the overpartitions.at n=34A361298
• Maximum second Zagreb index of maximal 3-degenerate graphs with n vertices.at n=41A372025