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A120149 a(n) = 2 + floor((1 + Sum_{j=1..n-1} a(j))/3). 2
2, 3, 4, 5, 7, 9, 12, 16, 21, 28, 38, 50, 67, 89, 119, 159, 212, 282, 376, 502, 669, 892, 1189, 1586, 2114, 2819, 3759, 5012, 6682, 8910, 11880, 15840, 21120, 28160, 37546, 50062, 66749, 88999, 118665, 158220, 210960, 281280, 375040, 500053, 666738 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
f[s_] := Append[s, Floor[(7 + Plus @@ s)/3]]; Nest[f, {2}, 44] (* Robert G. Wilson v, Jul 08 2006 *)
PROG
(SageMath)
@CachedFunction
def A120149(n): return 2 + (1+sum(A120149(k) for k in range(1, n)))//3
[A120149(n) for n in range(1, 61)] # G. C. Greubel, Jun 04 2023
CROSSREFS
Sequence in context: A272948 A164001 A117598 * A117597 A241336 A233522
KEYWORD
nonn
AUTHOR
Graeme McRae, Jun 10 2006
EXTENSIONS
More terms from Robert G. Wilson v, Jul 08 2006
STATUS
approved

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Last modified March 29 06:57 EDT 2024. Contains 371265 sequences. (Running on oeis4.)