Expansion of (2/(3*sqrt(1-4*z)-1+4*z))*((1-sqrt(1-4*z))/(2*z))^k with k=4.
A172061
Expansion of (2/(3*sqrt(1-4*z)-1+4*z))*((1-sqrt(1-4*z))/(2*z))^k with k=4.
Terms
- a(0) =1a(1) =5a(2) =22a(3) =91a(4) =367a(5) =1461a(6) =5776a(7) =22748a(8) =89402a(9) =350974a(10) =1377174a(11) =5403193a(12) =21201211a(13) =83211277a(14) =326703424a(15) =1283211208a(16) =5042294926a(17) =19822108582a(18) =77958648604a(19) =306739666198
External references
- oeis: A172061