A123212 - cp's OEIS frontend

A123212 Let S(1) = {1} and, for n > 1, let S(n) be the smallest set containing x, 2x and x^2 for each element x in S(n-1). a(n) is the sum of the elements in S(n).

n	a(n)
1	1
2	3
3	7
4	31
5	383
6	71679
7	4313284607
8	18447026747376402431
9	340282367000167840050178713574329810943
10	115792089237316195429848086745536112650120661123018741407845920610578123980799

[1, 3, 7, 31, 383, 71679, 4313284607, 18447026747376402431, 340282367000167840050178713574329810943, 115792089237316195429848086745536112650120661123018741407845920610578123980799]

cp's OEIS Frontend

A123212 Let S(1) = {1} and, for n > 1, let S(n) be the smallest set containing x, 2x and x^2 for each element x in S(n-1). a(n) is the sum of the elements in S(n).

Table of values

List of values