A261187 - cp's OEIS frontend

A261187 a(n) = (2^(n-1))!y(n) where y(n)=1/2(y(n-1))^2+1 for n>=2 and y(1)=1.

n	a(n)
1	1
2	3
3	51
4	131355
5	131953155208875
6	5496027066067360087228913484456796875
7	27805296606704951937976342299927372748633425216234990144120838935506416477839670037841796875

[1, 3, 51, 131355, 131953155208875, 5496027066067360087228913484456796875, 27805296606704951937976342299927372748633425216234990144120838935506416477839670037841796875]

cp's OEIS Frontend

A261187 a(n) = (2^(n-1))!y(n) where y(n)=1/2(y(n-1))^2+1 for n>=2 and y(1)=1.

Table of values

List of values

cp's OEIS Frontend

A261187 a(n) = (2^(n-1))!*y(n) where y(n)=1/2*(y(n-1))^2+1 for n>=2 and y(1)=1.

Table of values

List of values

A261187 a(n) = (2^(n-1))!y(n) where y(n)=1/2(y(n-1))^2+1 for n>=2 and y(1)=1.