25040

Appears in sequences

• Numbers k such that phi(k + 4) | sigma(k) + 4.at n=10A015870
• Number of basis partitions of n+49 with Durfee square size 7.at n=28A053802
• Number of Carmichael numbers between 2^n and 2^(n+1).at n=48A182490
• Number of 4-step left-handed knight's tours (moves only out two, left one) on an n X n board summed over all starting positions.at n=29A187174
• Number of cycles with at least 3 alternating runs in all permutations of [n] (it is assumed that the smallest element of a cycle is in the first position).at n=8A187252
• Dispersion of A008851, (numbers >1 and congruent to 0 or 1 mod 5), by antidiagonals.at n=55A191722
• Number of (w,x,y,z) with all terms in {1,...,n} and w<|x-y|+|y-z|.at n=31A212692
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 611", based on the 5-celled von Neumann neighborhood.at n=27A273214
• Composition of Lucas numbers A000032 with Fibonacci numbers A000045.at n=9A279277
• a(n) = 4*(n - 1)*(16*n - 23) for n >= 1.at n=20A304378
• Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 4 or 6 king-move adjacent elements, with upper left element zero.at n=7A304476
• Sum of all the parts in the partitions of n into 8 squarefree parts.at n=40A326444
• On a spirally numbered square grid, with labels starting at 1, this is the number of the last cell that an (n,n+1) leaper reaches before getting trapped, or -1 if it never gets trapped.at n=36A343179
• a(n) = A074829(2*n-1, n).at n=8A382432