20071

Properties

Appears in sequences

• Shifts left when INVERT transform applied thrice.at n=7A007564
• Table T(n,k), n>=0 and k>=0, read by antidiagonals: the k-th column given by the k-th Narayana polynomial.at n=58A008550
• Primes that remain prime through 4 iterations of function f(x) = 10x + 3.at n=7A023328
• Primes that remain prime through 5 iterations of the function f(x) = 10x + 3.at n=1A023356
• Prime(n) and prime(n+3) use the same digits.at n=24A069795
• Primes p having exactly one partition into distinct divisors of p+1.at n=37A085499
• a(n) = N(7,n), where N(7,x) is the 7th Narayana polynomial.at n=3A090200
• Primes congruent to 11 mod 59.at n=38A142738
• Primes congruent to 2 mod 61.at n=37A142800
• Numerators of triangle T(n,k), n>=1, 0<=k<=n - 1, read by rows: T(n,k) is the coefficient of x^k in polynomial p_n for the n-th row sequence of A145153.at n=59A145140
• Primes p such that (p+18), (p+36) and (p+72) are also prime.at n=25A175158
• Prime numbers 3*n-2 such that n, 2*n-1 and 3*n-2 are prime.at n=30A180025
• First of a run of 4 or more consecutive primes which all equal 1 (mod 3).at n=46A185942
• Triangle derived from an array of f(x), Narayana polynomials.at n=51A204057
• Primes of the form 2*n^2 + 34*n + 15.at n=8A217494
• Square array of Narayana polynomials N_n evaluated at the integers, A(n,k) = N_n(k), n>=0, k>=0, read by antidiagonals.at n=62A243631
• Prime numbers P such that 8*P^2-1 and 8*(8*P^2-1)^2-1 are also prime numbers.at n=32A245674
• Riordan array (1, x*f(x)) where f(x) is the g.f. of A007564.at n=37A265435
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 371", based on the 5-celled von Neumann neighborhood.at n=28A281520
• Number of sets of exactly five positive integers <= n having a square element sum.at n=31A281865