22617

Appears in sequences

• Take n points in general position in the plane; draw all the (infinite) straight lines joining them; sequence gives number of connected regions formed.at n=22A055503
• Numbers k such that x^k + x^10 + 1 is irreducible over GF(2).at n=11A057480
• G.f.: A(x) = INV(x - x*INV(x - 3*x*INV(x - 5*x*INV(x - 7*x*INV(x - ...))))), where INV(F(x)) = series reversion of F(x).at n=5A196659
• Number of partitions of n such that m(1) > m(2), where m = multiplicity.at n=40A240056
• One half of numbers representable in at least two different ways as sums of four nonvanishing cubes. See A259060 for these numbers and their representations.at n=12A261241
• Inverse binomial transform of A026007.at n=17A294503
• Numbers that are the sum of four third powers in six or more ways.at n=35A345148
• Numbers that are the sum of four third powers in exactly six ways.at n=29A345149
• Number of noncrossing permutations of [n] avoiding 213 (and by symmetry 132, 213, or 312).at n=7A383771