a(n) = S(3n), where S(n) is the generalized tribonacci sequence A001644.
A074582
a(n) = S(3n), where S(n) is the generalized tribonacci sequence A001644.
Terms
- a(0) =3a(1) =7a(2) =39a(3) =241a(4) =1499a(5) =9327a(6) =58035a(7) =361109a(8) =2246915a(9) =13980895a(10) =86992799a(11) =541292033a(12) =3368061131a(13) =20956960551a(14) =130399710235a(15) =811381230021
External references
- oeis: A074582