26845

Appears in sequences

• Number of words of length 4 in the n(n-1)/2 transpositions of S[ n ] equivalent to the identity.at n=13A029699
• Terms of A050530 with four prime divisors.at n=12A053340
• Odd composites (including 1 in the count) where the number 1 mod 4 equals the number 3 mod 4.at n=1A093180
• Square array T(n,d) read by antidiagonals: number of structurally-different guillotine partitions of a d-dimensional box in R^d by n hyperplanes.at n=51A103209
• Triangle related to guillotine partitions of a k-dimensional box by n hyperplanes.at n=59A107702
• a(n) = (1/n)*Sum_{i=0..n-1} C(n,i)*C(n,i+1)*6^i*7^(n-i), a(0)=1.at n=4A133307
• Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 0 1 vertically.at n=4A208022
• Number of nX5 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 0 1 vertically.at n=4A208025
• T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 0 1 vertically.at n=40A208028
• Number of 5 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 0 1 vertically.at n=4A208030
• Numbers n whose sum of anti-divisors is a permutation of their digits.at n=41A258786
• Number of nXn 0..1 arrays with every element unequal to 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=4A316759
• Number of nX5 0..1 arrays with every element unequal to 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=4A316760
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=40A316763