18782

Appears in sequences

• McKay-Thompson series of class 36C for Monster.at n=45A058646
• a(n) = Sum_{i=2^(n-1)..2^n-1} sigma_0(i), sigma_0(i) number of divisors of n, n positive integer.at n=11A153876
• Number of -n..n arrays x(0..3) of 4 elements with sum zero and with zeroth through 3rd differences all nonzero.at n=15A200040
• Difference between sum of largest parts and sum of smallest parts of all partitions of n into an odd number of parts.at n=29A211870
• Number of nX3 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.at n=8A241302
• First differences of A263096.at n=75A263097
• Number of length-n binary strings w with the property that if x is a subword of w and |x| >= 6, then x reversed is not a subword of w.at n=26A330012
• Number of triangles in the graph formed by drawing the lines connecting any two of the 2*(n+2) perimeter points of a 3 X (n+1) rectangular grid of points (or equally, a 2 X n grid of squares).at n=18A332606
• Irregular triangle read by rows: consider the structure formed by drawing the lines connecting any two of the 2*(n+2) perimeter points of an (n+1) X 3 rectangular grid of points (or equally, an n X 2 grid of squares); row n gives number of cells with k sides, for k >= 3.at n=67A335701