20578

Appears in sequences

• Row sums of triangle A131819.at n=38A131820
• Agreement numbers: number of nX3 arrays of the count of horizontal and vertical neighbors equal to the corresponding element in a random 0..2 nX3 array.at n=3A220798
• Agreement numbers: number of nX4 arrays of the count of horizontal and vertical neighbors equal to the corresponding element in a random 0..2 nX4 array.at n=2A220799
• T(n,k)=Agreement numbers: number of nXk arrays of the count of horizontal and vertical neighbors equal to the corresponding element in a random 0..2 nXk array.at n=17A220800
• T(n,k)=Agreement numbers: number of nXk arrays of the count of horizontal and vertical neighbors equal to the corresponding element in a random 0..2 nXk array.at n=18A220800
• Number of n X 2 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 3 binary array having a sum of three or less, with rows and columns of the latter in lexicographically nondecreasing order.at n=25A227265
• Numbers n such that the decimal equivalent of the binary reflected Gray code representation of n is a palindromic prime.at n=37A281382