A023497 a(n) = b(n) + d(n), where b(n) = (n-th Lucas number > 3) and d(n) = (n-th number that is 1 or is not a Lucas number).

5, 9, 16, 24, 37, 56, 86, 135, 212, 336, 536, 859, 1381, 2226, 3591, 5799, 9371, 15150, 24500, 39628, 64105, 103709, 167789, 271473, 439235, 710679, 1149884, 1860532, 3010384, 4870883, 7881233, 12752081, 20633278, 33385322

Offset: 0

Author

Clark Kimberling

Keywords

• nonn

Formula

a(n) = A000032(n+3)+A090946(n+1), n>0. - R. J. Mathar, Feb 01 2019