18509

Appears in sequences

• Number of positive integers <= 2^n of form 7 x^2 + 8 y^2.at n=18A054187
• 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, 0), (-1, 1, 1), (0, -1, 0), (1, 0, 1), (1, 1, -1)}.at n=8A149473
• Number of nondecreasing -6..6 vectors of length n whose dot product with some other -6..6 vector equals n.at n=5A226338
• T(n,k)=Number of nondecreasing -k..k vectors of length n whose dot product with some other -k..k vector equals n.at n=60A226340
• Number of nondecreasing -n..n vectors of length 6 whose dot product with some other -n..n vector equals 6.at n=5A226345
• Numbers that can be written in exactly two different ways as s_1^x_1 + ... + s_t^x_t, with 1 < s_1 < ... < s_t and {s_1,..., s_t} = {x_1,..., x_t} for some t > 0.at n=45A386966