17967

Appears in sequences

• Numerators of continued fraction convergents to sqrt(403).at n=7A041764
• Molien series for group H_{1,3}^{8} of order 2304.at n=39A051531
• a(n) = direuler(p=2,n,1/(1-X)/(1-p*n*X))[n].at n=25A089745
• a(1)=2, a(n)=2*a(n-1)-floor(sqrt(a(n-1))).at n=15A125028
• Number of base 27 n-digit numbers with adjacent digits differing by one or less.at n=7A126381
• 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, 1), (1, 1, -1)}.at n=9A148852
• Number of n X 7 binary arrays without the pattern 0 1 diagonally, vertically or antidiagonally.at n=25A188864
• Number of nX2 0..4 arrays with each element equal to the number its horizontal and vertical neighbors less than or equal to itself.at n=5A196538
• Number of nX6 0..4 arrays with each element equal to the number its horizontal and vertical neighbors less than or equal to itself.at n=1A196542
• T(n,k)=Number of nXk 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors less than or equal to itself.at n=22A196544
• T(n,k)=Number of nXk 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors less than or equal to itself.at n=26A196544
• Number of fixed polypons with n cells (division into triangles is significant).at n=13A196993
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + n*b(n), where a(0) = 1, a(1) = 2, b(0) = 3, b(1) = 4, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences.at n=14A296293
• Indices k such that the determinant of the 3 X 3 Hankel matrix of consecutive primes starting at prime(k) is 0.at n=22A392523