21595

Appears in sequences

• a(n) = (1/2)*A014431(n+2).at n=10A025235
• 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), (0, 1, 0), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.at n=7A151159
• a(n) = 441*n^2 - 2*n.at n=6A157737
• Values x of successive minima records of k = log(x)/log(-d) where d runs through the negative values of x^3-round(sqrt(x^3))^2.at n=11A232008
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 345", based on the 5-celled von Neumann neighborhood.at n=28A281220
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 405", based on the 5-celled von Neumann neighborhood.at n=28A281850
• Number of 4-cycles in the n-polygon diagonal intersection graph.at n=32A300552
• Number of set partitions of [n] with alternating parity of elements and exactly four blocks.at n=10A305778
• Expansion of g^2/(1 - x^3*g), where g = 1+x*g^3 is the g.f. of A001764.at n=7A391123