130303

Properties

Appears in sequences

• Primes of the form p^k - p + 1 for prime p.at n=28A034915
• Primes whose digit reversal is a triangular number.at n=24A115705
• Numbers of length n binary words with fewer than 9 0-digits between any pair of consecutive 1-digits.at n=17A145117
• a(n) = 2^(2*n+1) - 3*2^n - 1.at n=7A195460
• Primes in A195460.at n=4A195461
• Number of length-4 0..n arrays with no adjacent pair x,x+1 repeated.at n=18A269657
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 779", based on the 5-celled von Neumann neighborhood.at n=16A290297
• Number of nX4 0..1 arrays with each 1 adjacent to 0, 1 or 3 king-move neighboring 1s.at n=5A296647
• Number of nX6 0..1 arrays with each 1 adjacent to 0, 1 or 3 king-move neighboring 1s.at n=3A296649
• T(n,k)=Number of nXk 0..1 arrays with each 1 adjacent to 0, 1 or 3 king-move neighboring 1s.at n=39A296651
• T(n,k)=Number of nXk 0..1 arrays with each 1 adjacent to 0, 1 or 3 king-move neighboring 1s.at n=41A296651
• a(n) = Sum_{1 <= x_1, x_2, x_3 <= n} n/gcd(x_1, x_2, x_3, n).at n=18A372952
• Prime numbersat n=12186