a(n) = (F(3*n+2) - 1)/4, where F=A000045 (the Fibonacci sequence).

A049652

a(n) = (F(3*n+2) - 1)/4, where F=A000045 (the Fibonacci sequence).

Terms

    a(0) =0a(1) =1a(2) =5a(3) =22a(4) =94a(5) =399a(6) =1691a(7) =7164a(8) =30348a(9) =128557a(10) =544577a(11) =2306866a(12) =9772042a(13) =41395035a(14) =175352183a(15) =742803768a(16) =3146567256a(17) =13329072793a(18) =56462858429a(19) =239180506510

External references