50451

Appears in sequences

• Indices of primes at which the prime race 4k-1 vs. 4k+1 is tied.at n=29A038691
• Smaller terms in the pairs of numbers (a < b) in the sequence {a,b}-> {Max[{a,b}]-Min[{a,b}],k*Min[{a,b}]} with k=3 and the first pair {a=1,b=2}. See A075256.at n=49A075257
• Majority value maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal, vertical and antidiagonal neighbors in a random 0..3 nX4 array.at n=3A220311
• T(n,k)=Majority value maps: number of nXk binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal, vertical and antidiagonal neighbors in a random 0..3 nXk array.at n=24A220313
• a(n) is the first k such that A277515(k) is the n-th prime.at n=22A278107