123648

Appears in sequences

• Number of hyperplanes spanned by the vertices of an n-cube that cover exactly n vertices.at n=5A007849
• Partial sums of A001935; at one time this was conjectured to agree with A007478.at n=47A014605
• Numbers divisible by at least five of their digits, different and >1.at n=13A187533
• a(n) = 2^(n-1)*(3^n-2^(n+1)+1).at n=7A228701
• Integers k such that numerator and denominator of sigma(k)/k are both prime.at n=19A247086
• 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 121", based on the 5-celled von Neumann neighborhood.at n=16A278958
• Primitive terms in A066192: number k such that k is a term of A066192 and k/2 is not.at n=27A383428
• Indices of records in A378865.at n=21A385290
• Expansion of (1/x) * Series_Reversion( x * (1 - x^2 * (1 + x)^3) ).at n=12A389295