68719214592
domain: N
Appears in sequences
- a(n) = 4^n - 2^n.at n=18A020522
- Number of words of length 2n in the two letters s and t that reduce to the identity 1 by using the relations ssTT=1, ststSS=1 and ststTT=1, where S and T are the inverses of s and t, respectively (i.e., sS=1 and tT=1). The generators s and t and the three stated relations generate the quaternion group Q4.at n=18A071930
- Number of strings of length n over GF(4) with trace 0 and subtrace 1.at n=19A073996
- Smallest oblong number having n prime divisors (with multiplicity).at n=23A083001
- Euler totient function phi values of multiperfect numbers.at n=24A098203
- a(n) = 2^(p - 2)*(2^p - 2), where p = prime(n).at n=7A141083
- Number of non-palindromic n-tuples of 4 distinct elements.at n=17A242026
- Totient of the n-th perfect number.at n=6A257665
- 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 213", based on the 5-celled von Neumann neighborhood.at n=35A279879
- 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 469", based on the 5-celled von Neumann neighborhood.at n=35A282417
- Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 493", based on the 5-celled von Neumann neighborhood.at n=35A288663