37279

Appears in sequences

• a(1) = 1, a(n) = smallest number > a(n-1) such that concatenation a(k) a(n) is prime for all k = 1 to n-1. Stop if no such number exists.at n=7A075611
• a(1) = 1, then the smallest number such that the concatenation a(r), a(s) is prime for all s > r.at n=8A088647
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 0), (0, 1, -1), (1, 0, -1), (1, 1, 0)}.at n=10A148684
• Number of -n..n arrays of 4 elements with first, second and third differences also in -n..n.at n=9A202125
• Number of 3 X 3 0..n symmetric arrays with all rows summing to floor(n*3/2).at n=42A213801