30127

Appears in sequences

• Numbers k such that in k and k^2 the parity of digits alternates.at n=42A030153
• Numbers k that, when expressed in base 6 and then interpreted in base 9, give a multiple of k.at n=18A062939
• a(n) = 49*n^2 - 20*n + 2.at n=24A157373
• a(n) = number of new distinct proper angles with vertex and legs on grid points in an n X n square grid that were not found in an (n-1) X (n-1) square grid.at n=39A252592
• p-INVERT of (0,1,0,1,0,1,...), where p(S) = 1 - 2 S - S^2 + S^3.at n=10A291242