130023424

Appears in sequences

• First differences of A045891.at n=26A034007
• a(n) = 2^(n-1)*(3*n-4).at n=22A053565
• Number of subsets of {1,.., n} containing at least one square.at n=26A089888
• Numerator of b(n) given by b(1) = 1, b(2) = 2; for n >= 3, b(n) = (-1)^n (2n-1) ((n-2)!!)^2/((n-1)!!)^2, where n!! is the double factorial A006882.at n=15A095159
• Second differences of A045623, prefixed by an initial 1.at n=25A109975
• Numerators in the fractional coefficients that form the partial quotients of the continued fraction representation of the inverse tangent of 1/x.at n=15A110255
• Numerators in the coefficients that form the even-indexed partial quotients of the continued fraction representation of the inverse tangent of 1/x.at n=7A110259
• Numbers with 46 divisors.at n=9A175753
• a(1) = 1, a(2) = 2, a(3) = 5, a(4) = 8 and a(5) = 15, a(n) = Sum_{j=1..n-1} a(j).at n=27A257548
• Let S_k denote the sequence of numbers j such that A001222(j) - A001221(j) = k. Then a(n) is the n-th term of S_n.at n=20A261256
• Decimal representation of the n-th iteration of the "Rule 91" elementary cellular automaton starting with a single ON (black) cell.at n=24A267042
• 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 283", based on the 5-celled von Neumann neighborhood.at n=26A287493