93493

Properties

Appears in sequences

• Primes p such that positive values of p - A002110(k) are all primes for k > 0.at n=28A068374
• Smallest prime beginning and ending in 2n+1 or 0 if no such prime exists.at n=46A071234
• Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and having k 1-cell columns (0<=k<=n). A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column.at n=46A121554
• Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 11011-01110-00100 pattern in any orientation.at n=17A147487
• a(n) = (n^4 - n^3 + 4*n^2 + 2)/2.at n=21A239592
• A(n, k) is the k-th number b > 1 such that b^(prime(n+i)-1) == 1 (mod prime(n+i)^2) for each i = 0..4, with k running over the positive integers; square array, read by antidiagonals, downwards.at n=28A319062
• Primes which yield again a prime when the digits are taken according to the lexicographically first superpermutation of corresponding order and of minimal length.at n=50A332088
• Numbers b > 1 such that the smallest five primes, i.e., 2, 3, 5, 7 and 11 are base-b Wieferich primes.at n=7A339534
• Prime numbersat n=9029