Square spiral of sums of selected preceding terms, starting at 1 (a spiral Fibonacci-like sequence).

A094767

Square spiral of sums of selected preceding terms, starting at 1 (a spiral Fibonacci-like sequence).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =8a(5) =13a(6) =26a(7) =40a(8) =81a(9) =123a(10) =205a(11) =412a(12) =620a(13) =1034a(14) =2072a(15) =3120a(16) =5204a(17) =8332a(18) =16677a(19) =25056a(20) =41772a(21) =66854a(22) =133748a(23) =200749a(24) =334741a(25) =535694a(26) =870558a(27) =1741321a(28) =2612619a(29) =4355177

External references