21399

Appears in sequences

• Number of combinatorial configurations of type (n_3).at n=13A001403
• Numerators of continued fraction convergents to sqrt(92).at n=8A041164
• 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, -1, 0), (-1, 1, 0), (0, 1, -1), (1, -1, 1), (1, 0, 0)}.at n=10A148250
• a(n) = (A002704(n) - 2)/2.at n=3A262584
• a(n) = 27*n^2/2 + 45*n/2 - 12 (n>=1).at n=38A304375
• Numbers k such that k^(k + 1) == k + 1 (mod 2*k + 1) while 2*k+1 is not prime.at n=3A380831