A119561 - cp's OEIS frontend

A119561 Define F(n) = 2^(2^n)+1 = the 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)+1+2^n-1+1 = 2^(2^n)+2^n+1 = F(n)+2^n.

n	a(n)
0	4
1	7
2	21
3	265
4	65553
5	4294967329
6	18446744073709551681
7	340282366920938463463374607431768211585
8	115792089237316195423570985008687907853269984665640564039457584007913129640193

[4, 7, 21, 265, 65553, 4294967329, 18446744073709551681, 340282366920938463463374607431768211585, 115792089237316195423570985008687907853269984665640564039457584007913129640193]

cp's OEIS Frontend

A119561 Define F(n) = 2^(2^n)+1 = the 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)+1+2^n-1+1 = 2^(2^n)+2^n+1 = F(n)+2^n.

Table of values

List of values