294911

Properties

Appears in sequences

• Class 1+ primes: primes of the form 2^i*3^j - 1 with i, j >= 0.at n=35A005105
• Primes of the form 9*2^n-1.at n=4A050524
• Expansion of (1+x^2-x^3)/((1-x)*(1-2*x)).at n=17A052996
• a(1) = 2, a(n+1) = smallest squarefree number == 1 (mod a(n)) and > a(n).at n=18A076698
• 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, 1), (-1, 0, 1), (1, -1, 0), (1, 0, 0), (1, 1, -1)}.at n=12A148202
• Primes of the form 2*p^2 + 4*p + 1, where p is also prime.at n=26A164041
• a(n) = 9*8^n - 1.at n=5A198856
• Primes of the form 9n^3-1.at n=6A200960
• Least prime p such that p+1 is divisible by 2^n and not by 2^(n+1).at n=15A201914
• Primes of the form 2^(k-1)*k^2-(-1)^k.at n=9A216362
• Primes of the form m = 8^i + 8^j - 1, where i > j >= 0.at n=5A239718
• Record values in A135141.at n=33A246347
• Primes of the form 2^i * 3^j - 1 for positive i, j.at n=28A268640
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 141", based on the 5-celled von Neumann neighborhood.at n=19A279148
• 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 249", based on the 5-celled von Neumann neighborhood.at n=19A287140
• Coefficients of 1/(Sum_{k>=0} [(k+1)*r]*(-x)^k), where r = sqrt(7/3) and [ ] = floor.at n=18A288135
• a(n) is the least prime of the form 2^j*3^k - 1, j > 0, k > 0, j + k = n. a(n) = 0 if no such prime exists.at n=15A337437
• Prime numbersat n=25607