|
|
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
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
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
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|