A279482 Sum of the first n Lucas numbers whose indices are prime.
3, 7, 18, 47, 246, 767, 4338, 13687, 77766, 1227617, 4237966, 58256487, 428504938, 1397827967, 8041666846, 127260518217, 2266556004016, 7867304297817, 108368654581246, 797215157169645, 2600638713977566, 34961761386236715, 256768195924215394
Offset: 1
Keywords
Links
- Vincenzo Librandi, Table of n, a(n) for n = 1..500
Programs
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Magma
[&+[Lucas(NthPrime(i)): i in [1..n]]: n in [1..30]];
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Mathematica
Accumulate[LucasL[Prime[Range[25]]]]
Formula
From Jon E. Schoenfield, Dec 18 2016: (Start)
a(n) = Sum_{i=1..n} A180363(i).
Comments