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 A063680 Solutions to sigma(n)+7 = sigma(n+7). 2
 74, 531434, 387420482 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS No other solutions < 4,290,000,000. Sequence A063679 shows how to generate more solutions, but there may be solutions other than those produced by A063679. LINKS EXAMPLE sigma(74)+7 = 121 = sigma(74+7), so 74 is in the sequence. CROSSREFS Cf. A000203, A063679, A015913-A015917, A054905. Sequence in context: A093274 A145695 A116132 * A220472 A033395 A143754 Adjacent sequences:  A063677 A063678 A063679 * A063681 A063682 A063683 KEYWORD nonn,bref AUTHOR Jud McCranie, Jul 28 2001 STATUS approved

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