A119564 - cp's OEIS frontend

A119564 Define F(n) = 2^(2^n)+1 = n-th Fermat number, M(n) = 2^n-1 = the n-th Mersenne number. Then a(n) = F(n)-M(n)-1 = 2^(2^n) - 2^n + 1.

n	a(n)
0	2
1	3
2	13
3	249
4	65521
5	4294967265
6	18446744073709551553
7	340282366920938463463374607431768211329
8	115792089237316195423570985008687907853269984665640564039457584007913129639681

[2, 3, 13, 249, 65521, 4294967265, 18446744073709551553, 340282366920938463463374607431768211329, 115792089237316195423570985008687907853269984665640564039457584007913129639681]

cp's OEIS Frontend

A119564 Define F(n) = 2^(2^n)+1 = n-th Fermat number, M(n) = 2^n-1 = the n-th Mersenne number. Then a(n) = F(n)-M(n)-1 = 2^(2^n) - 2^n + 1.

Table of values

List of values