Place a(n) blue and b(n) (A180002) red balls in an urn, draw 5 balls without replacement; Probability(5 red balls) = Probability(3 red and 2 blue balls).
A180003
Place a(n) blue and b(n) (A180002) red balls in an urn, draw 5 balls without replacement; Probability(5 red balls) = Probability(3 red and 2 blue balls).
Terms
- a(0) =1a(1) =2a(2) =7a(3) =13a(4) =56a(5) =247a(6) =475a(7) =2108a(8) =9361a(9) =18019a(10) =80030a(11) =355453a(12) =684229a(13) =3039014a(14) =13497835a(15) =25982665a(16) =115402484a(17) =512562259a(18) =986657023a(19) =4382255360a(20) =19463867989a(21) =37466984191a(22) =166410301178a(23) =739114421305
External references
- oeis: A180003