self Interview Logical Reasoning Number Series

What is the next number of the following sequence
15, 22, 39, 77, 143, 245,...

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self Other Question

What is the next number of the following sequence
1, 1, 3, 7, 13, 21,... ?
main()
{
int i=0;
for(;i++;printf("%d",i));
printf("%d",i);
}