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A120141
a(n) = 14 + floor( (1 + Sum_{j=0..n-1} a(j)) / 2).
3
14, 21, 32, 48, 72, 108, 162, 243, 364, 546, 819, 1229, 1843, 2765, 4147, 6221, 9331, 13997, 20995, 31493, 47239, 70859, 106288, 159432, 239148, 358722, 538083, 807125, 1210687, 1816031, 2724046, 4086069, 6129104, 9193656, 13790484
OFFSET
1,1
LINKS
MATHEMATICA
nxt[{t_, a_}]:=Module[{a2=14+Floor[(1+t)/2]}, {t+a2, a2}]; NestList[nxt, {0, 14}, 60][[All, 2]]//Rest (* Harvey P. Dale, Nov 28 2018 *)
PROG
(SageMath)
@CachedFunction
def A120141(n): return 14 +(1 +sum(A120141(k) for k in range(1, n)))//2
[A120141(n) for n in range(1, 60)] # G. C. Greubel, May 11 2023
KEYWORD
nonn
AUTHOR
Graeme McRae, Jun 10 2006
STATUS
approved