20903

Properties

Appears in sequences

• Primes p whose period of reciprocal equals (p-1)/7.at n=18A056212
• Primes that are each the sum of two, three, and four consecutive composite numbers.at n=25A060339
• Triangle read by rows of numbers of paths in a lattice satisfying certain conditions.at n=53A071950
• Primes in A051022.at n=39A092908
• Primes of the form a^5 + b^3 with a,b>0.at n=25A100273
• Primes of the form a^5 + b^4 with a>0.at n=11A100274
• Let p = prime(sigma(n)) and q = prime(phi(n)), then p is in the sequence if p-q = 6.at n=25A103176
• Prime numbers obtained by inserting a 0 between each pair of adjacent digits of a prime number > 10.at n=26A119680
• Primes p such that their cubes are pandigital.at n=11A124629
• Primes congruent to 17 mod 59.at n=40A142744
• Primes congruent to 41 mod 61.at n=38A142839
• Primes of the form 6*n^2+17.at n=39A151953
• Riordan matrix (g(x),x*g(x)), where g(x) = (1-x-sqrt(1-2*x-3*x^2-4*x^3))/(2*x^2*(1+x)).at n=68A190252
• Number of nX4 0..4 arrays with each element equal to the number its horizontal and vertical neighbors unequal to itself.at n=15A195958
• Numbers of the form 4^j + 7^k, for j and k >= 0.at n=45A226817
• Numbers of the form 7^j + 8^k, for j and k >= 0.at n=29A226825
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 621", based on the 5-celled von Neumann neighborhood.at n=25A273268
• Popularity of left children in treeshelves avoiding pattern T321.at n=6A278678
• Poincaré series for invariant polynomial functions on the space of binary forms of degree 12.at n=27A293937
• Numbers of the form a^5 + b^6, with integers a, b > 0.at n=32A303375