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A249613
Integers that reach the (1023, 512) cycle described in A234534, after iterations of numerator(sigma(n)/n) = A017665(n).
3
81, 106, 121, 133, 148, 160, 162, 170, 189, 211, 212, 214, 237, 297, 301, 313, 314, 320, 340, 352, 361, 378, 381, 394, 409, 410, 428, 438, 442, 474, 502, 512, 535, 583, 605, 609, 621, 627, 645, 647, 648, 657, 680, 691, 692, 704, 709, 710, 717, 736, 742, 748
OFFSET
1,1
PROG
(PARI) finalc(x, v) = {while (!vecsearch(v, x), x = numerator(sigma(x)/x)); x; }
lista(nn, targ=512) = {v = [8, 127, 512, 29127]; for (i=2, nn, if (finalc(i, v) == targ, print1(i, ", ")); ); }
CROSSREFS
KEYWORD
nonn
AUTHOR
Michel Marcus, Nov 02 2014
STATUS
approved