Expansion of (2/(3*sqrt(1-4*z)-1+4*z))*((1-sqrt(1-4*z))/(2*z))^k with k=3.
A172025
Expansion of (2/(3*sqrt(1-4*z)-1+4*z))*((1-sqrt(1-4*z))/(2*z))^k with k=3.
Terms
- a(0) =1a(1) =4a(2) =16a(3) =62a(4) =239a(5) =920a(6) =3544a(7) =13672a(8) =52834a(9) =204528a(10) =793092a(11) =3080226a(12) =11980667a(13) =46662704a(14) =181971248a(15) =710454896a(16) =2776717742a(17) =10863073784a(18) =42537035408a(19) =166704021596a(20) =653827252022
External references
- oeis: A172025