22906492245
domain: N
Appears in sequences
- a(n) = (4^n - 1)/3.at n=18A002450
- a(n) = Sum_{k=0..floor(n/2)} A026637(n, k).at n=35A026645
- Smallest number to give 2^(2n) in a hailstone (or 3x + 1) sequence.at n=17A054646
- A Jacobsthal related sequence.at n=7A083228
- Column 1 of the array in A107735.at n=34A107732
- A trisection of A024495.at n=12A132805
- a(n) is the number whose binary expansion is A153500(n).at n=17A153499
- Jacobsthal numbers A001045, every second term incremented by 1.at n=36A155944
- a(n) is the smallest positive multiple k of n such that every length of the runs of 0's and 1's in the binary representation of k divides n.at n=36A162536
- Expansion of x*(1+3*x)/ ( (1-4*x)*(1+x+x^2)).at n=18A191597
- a(n) = (16^n-1)/3.at n=9A195156
- Last number in row n of triangle A199636.at n=32A199638
- Number of nonzero elements in GF(2^n) that are cubes.at n=35A213243
- Numerator of sum(i=1..n, 3*i/4^i ).at n=19A215712
- a(n) = Jacobsthal(n^2), where Jacobsthal(n) = A001045(n), for n>=1.at n=5A231279
- 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 129", based on the 5-celled von Neumann neighborhood.at n=34A279030
- 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 553", based on the 5-celled von Neumann neighborhood.at n=36A282577
- a(n) = A306896(n)/6.at n=36A306897
- Indices of records in A347409.at n=20A347668