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A285578
a(1) = a(3) = a(4) = 2, a(2) = 1; a(n) = a(a(n-2)) + a(n-a(n-4)-2) for n > 4.
1
2, 1, 2, 2, 3, 3, 4, 4, 4, 5, 5, 6, 7, 7, 8, 8, 8, 8, 8, 9, 9, 10, 11, 12, 12, 13, 13, 14, 15, 15, 16, 16, 16, 16, 16, 16, 16, 17, 17, 18, 19, 19, 20, 20, 21, 21, 21, 22, 22, 23, 24, 25, 27, 27, 28, 28, 28, 29, 29, 30, 31, 31, 32, 32, 32, 32, 32, 32, 32, 32, 32, 33, 33, 34, 35
OFFSET
1,1
MATHEMATICA
a[1] = a[3] = a[4] = 2; a[2] = 1; a[n_] := a[n] = a[a[n - 2]] + a[n - a[n - 4] - 2]; Array[a, 75] (* Michael De Vlieger, Apr 24 2017 *)
PROG
(PARI) q=vector(10000); q[1]=q[3]=q[4]=2; q[2]=1; for(n=5, #q, q[n]=q[q[n-2]]+q[n-q[n-4]-2]); vector(10000, n, q[n])
CROSSREFS
Sequence in context: A224931 A029195 A242745 * A029168 A035454 A161228
KEYWORD
nonn
AUTHOR
Altug Alkan, Apr 22 2017
STATUS
approved