22453

Properties

Appears in sequences

• Least prime in A031934 (lesser of 16-twins) whose distance to the next 16-twin is 6*n.at n=25A052357
• Primes p such that sum of squares of even-position digits equals the sum of squares of odd-position digits of p.at n=6A076168
• a(n) = (3*4^n - 2*3^n + 2^n)/2.at n=7A083330
• G.f.: (1+x)/Product_{m>0} (1 - x^m).at n=34A084376
• Primes p of Erdos-Selfridge class 4+ with largest prime factor of p+1 not of class 3+.at n=16A129472
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, -1), (-1, 0, 1), (1, -1, 0), (1, 1, 0)}.at n=9A149137
• Number of isomorphism classes of nanocones with 3 pentagons and a nearsymmetric boundary of length n.at n=39A198014
• Primes of the form 5n^2 + 8.at n=11A201486
• Smooth Lyndon words with 4 colors.at n=12A215330
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 203", based on the 5-celled von Neumann neighborhood.at n=32A270727
• Pisot sequence E(8,12), a(n) = floor( a(n-1)^2/a(n-2) + 1/2 ).at n=19A274951
• Iterations at which Langton's Ant living on triangular tiling reaches the distance of n from the origin for the first time.at n=42A275303
• Sum of the largest parts of the partitions of n into 10 squarefree parts.at n=46A326637
• Primes p such that (p+nextprime(p))/6 is prime and 6*p is the sum of two consecutive primes.at n=20A339775
• Total number of acyclic orientations in all complete multipartite graphs K_lambda, where lambda ranges over all partitions of n into distinct parts.at n=8A370613
• Primes having only {2, 3, 4, 5} as digits.at n=31A386139
• Prime numbersat n=2512