Sequence identical to its third differences: a(n+3) = 3a(n+2)-3a(n+1)+2a(n), with a(0)=1, a(1)=4, a(2)=9.

A130785

Sequence identical to its third differences: a(n+3) = 3a(n+2)-3a(n+1)+2a(n), with a(0)=1, a(1)=4, a(2)=9.

Terms

    a(0) =1a(1) =4a(2) =9a(3) =17a(4) =32a(5) =63a(6) =127a(7) =256a(8) =513a(9) =1025a(10) =2048a(11) =4095a(12) =8191a(13) =16384a(14) =32769a(15) =65537a(16) =131072a(17) =262143a(18) =524287a(19) =1048576a(20) =2097153a(21) =4194305a(22) =8388608a(23) =16777215a(24) =33554431a(25) =67108864a(26) =134217729a(27) =268435457a(28) =536870912a(29) =1073741823

External references