Upper (1/2)-midsequence of Fibonacci numbers (A000045) and tribonacci numbers (A000213); see Comments.

A390349

Upper (1/2)-midsequence of Fibonacci numbers (A000045) and tribonacci numbers (A000213); see Comments.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =4a(5) =7a(6) =13a(7) =22a(8) =39a(9) =70a(10) =124a(11) =222a(12) =399a(13) =717a(14) =1293a(15) =2337a(16) =4230a(17) =7671a(18) =13933a(19) =25340a(20) =46145a(21) =84126a(22) =153520a(23) =280408a(24) =512581a(25) =937653a(26) =1716313a(27) =3143363a(28) =5759816a(29) =10558795

External references