A153758 a(n) = Sum_{k=1..n} A153757(k).
1, 3, 7, 17, 57, 337, 3737, 72657, 2369257, 127188257, 11156500857, 1592432891857, 369041278550057, 138668563737942657, 84415532990575319257, 83213455958038482903857, 132788829902694935512664457, 342962001904259249964245209057
Offset: 1
Keywords
Examples
a(4) = 17 = (1 + 2 + 4 + 10), where A153757 = (1, 2, 4, 10, 40, 280, ...).
Programs
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Mathematica
a[n_] := Sum[Fibonorial[k], {k, 1, n}]; Accumulate @ Table[a[n], {n, 1, 20}] (* Amiram Eldar, Feb 26 2020 *)
Formula
Extensions
More terms from Amiram Eldar, Feb 26 2020