Period of the sequence of the digital roots of Fibonacci n-step numbers.

Terms

a(0) =1a(1) =24a(2) =39a(3) =78a(4) =312a(5) =2184a(6) =1092a(7) =240a(8) =273a(9) =26232a(10) =11553a(11) =9840a(12) =177144a(13) =14348904a(14) =21523359a(15) =10315734a(16) =48417720a(17) =16120104a(18) =15706236a(19) =5036466318a(20) =258149112a(21) =1162261464a(22) =141214768239a(23) =421900912158a(24) =8857200a(25) =2184a(26) =2271a(27) =28578504864