Second differences of Mersenne numbers A001348, divided by 4.

A139243

Second differences of Mersenne numbers A001348, divided by 4.

Terms

    a(0) =5a(1) =18a(2) =456a(3) =1056a(4) =29184a(5) =67584a(6) =1867776a(7) =130154496a(8) =270532608a(9) =33420214272a(10) =481573208064

External references