67488

Appears in sequences

• Number of points of l_1 norm n in the "diamond" lattice D^+_4.at n=37A035878
• If X_1, ..., X_n is a partition of a 2n-set X into 2-blocks then a(n) is equal to the number of 3-subsets of X containing none of X_i, (i=1,...,n).at n=35A130809
• Numbers k such that the sum of the Carmichael lambda functions of the divisors is a proper divisor of k.at n=33A131492
• Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0, 2 or 4 neighboring 1's.at n=4A296629
• Number of nX5 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0, 2 or 4 neighboring 1s.at n=4A296632
• T(n,k)=Number of nXk 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0, 2 or 4 neighboring 1s.at n=40A296635
• Sum of all the parts in the partitions of n into 7 parts.at n=37A308926
• Numbers m such that m | A000385(m-1) = Sum_{k=1..m-1} sigma(k) * sigma(m-k).at n=27A326608