56041

Properties

Appears in sequences

• Half-quartan primes: primes of the form p = (x^4 + y^4)/2.at n=20A002646
• Palindromic primes in base 15.at n=39A029982
• a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = 2*n - 2 - 2^(p+1) and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1, a(2) = 2 and a(3) = 4.at n=18A049915
• Indices of primes in sequence defined by A(0) = 77, A(n) = 10*A(n-1) - 13 for n > 0.at n=16A056259
• Primes whose digit reversal is a pentagonal number (A000326).at n=19A115706
• Primes of the form k^2 + k + 55661, with k >= 0.at n=16A116206
• Number of (n+3) X 1 arrays of occupancy after each element moves up to +-3 places but not 0.at n=6A222550
• T(n,k)=Number of length (n+k)X1 arrays of occupancy after each element moves up to +-k places but not 0.at n=42A222555
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 517", based on the 5-celled von Neumann neighborhood.at n=38A272732
• Number of nX4 0..1 arrays with every element equal to 0, 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.at n=9A299454
• Prime numbersat n=5687