A087758 Index of first occurrence of n in A005229.
1, 3, 4, 6, 7, 8, 10, 12, 13, 14, 16, 17, 19, 20, 21, 22, 24, 26, 27, 29, 31, 32, 33, 34, 36, 37, 39, 40, 41, 43, 46, 47, 48, 49, 50, 51, 53, 55, 56, 58, 59, 60, 61, 63, 64, 67, 69, 70, 71, 72, 73, 74, 75, 77, 80, 81, 82, 83, 85, 87, 88, 89, 90, 92, 94, 95, 98, 99, 100, 102
Offset: 1
Keywords
Crossrefs
Cf. A005229.
Programs
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PARI
{m=102;v5229=vector(m);v5229[1]=1;v5229[2]=1;for(k=3,m,v5229[k]=v5229[v5229[k-2]]+v5229[k-v5229[k-2]]); v=vector(m);for(j=1,m,if(v[v5229[j]]==0,v[v5229[j]]=j));n=0;while(v[n++ ]>0,print1(v[n],","))}
Formula
a(n) = least k such that A005229(k) = n.
Extensions
Edited by N. J. A. Sloane, Apr 07 2006