252726

Appears in sequences

• a(n) is the concatenation of 3n-2, 3n and 3n-1.at n=8A248555
• Number of nX(n+4) arrays of permutations of n+4 copies of 0..n-1 with every element equal to or 1 greater than any north or northeast neighbors modulo n and the upper left element equal to 0.at n=4A267557
• Number of 5Xn arrays containing n copies of 0..5-1 with every element equal to or 1 greater than any north or northeast neighbors modulo 5 and the upper left element equal to 0.at n=8A267559