21719

Appears in sequences

• Smallest integer >= 0 of the form x^3 - n^4.at n=28A070930
• a(n) = (n-1)*(n-2)^4 - A028294(n), for n > 4, with a(1) = a(2) = 0, a(3) = 2, and a(4) = 48.at n=10A075690
• 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, -1), (-1, 0, 0), (1, -1, 1), (1, 0, 0), (1, 1, 0)}.at n=8A150337
• Coordination sequence for (2,4,7) tiling of hyperbolic plane.at n=26A265062
• Numbers k such that (67*10^k + 17)/3 is prime.at n=20A282620
• Number of distinct pairs (m, y), where m >= 1 and y is an integer partition of n, such that m can be obtained by iteratively adding or multiplying together parts of y until only one part (equal to m) remains.at n=15A319910
• Distinct values of gcd(B(2*j), B(2*j+2)) in the order of their appearance, where B(k) = A027641(k).at n=26A343829