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 A218980 Integers not in A218852. 2
 1, 2, 3, 4, 6, 8, 9, 11, 12, 17, 18, 22, 23, 24, 29, 30, 36, 37, 41, 47, 48, 53, 59, 60, 67, 71, 72, 79, 83, 89, 97, 101, 107, 113, 120, 127, 131, 137, 144, 149, 157, 163, 167, 173, 179, 180, 191, 197, 210, 211, 223, 227, 233, 239, 240, 251, 257, 263, 269, 277 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Conjecture: This sequence is infinite. LINKS PROG (JavaScript) function divisorSum(n) { c=0; for (i=1; i<=n; i++) if (n%i==0) c+=i; return c; } ds=new Array(); for (j=1; j<1001; j++) ds[j]=divisorSum(j); a=new Array(); ac=0; for (j=1; j<300; j++) for (k=1; k<=j; k++) for (m=1; m<=k; m++) if (ds[j]+ds[k]+ds[m]==ds[j+k+m]) a[ac++]=j+k+m; a.sort(function(a, b) {return a-b; }); i=0; while(i++

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Last modified June 12 10:58 EDT 2021. Contains 344947 sequences. (Running on oeis4.)