29856

Appears in sequences

• a(n) = n*(2*n^2 - 3*n + 4)/3.at n=36A037235
• 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, 0, 1), (0, 0, -1), (1, -1, 0), (1, 1, 0)}.at n=9A149198
• a(n) = 2025*n^2 - 649*n + 52.at n=3A156853
• Numbers n such that A242720(n) = prime(n)*(prime(n)+4)+3 and A242719(n) - A242720(n) = 2*(prime(n)-1).at n=9A247279
• Number of set-systems covering n vertices with cut-connectivity >= 2, or 2-cut-connected set-systems.at n=4A327112
• Irregular triangle read by rows where T(n,k) is the number of independent sets of size k in the n-hypercube graph.at n=26A354802
• T(j,k) are the numerators s in the representation R = s/t + (2/Pi)*u/v of the resistance between two nodes separated by the distance vector (j,k) in an infinite square lattice of one-ohm resistors, where T(j,k), j >= 0, 0 <= k <= j, is a triangle read by rows.at n=36A355565
• Irregular triangle read by rows: T(n,k) is the number of free polyominoes with n cells having k regions between the polyominoes and their bounding boxes, n >= 1, k >= 0.at n=59A380282