id:A076518 - OEIS Search Results

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Numbers n such that Fibonacci(n) == sigma(n) (mod n).

+0
2

1, 2, 4, 11, 19, 29, 31, 41, 59, 61, 71, 79, 89, 101, 109, 120, 131, 139, 149, 151, 179, 181, 191, 199, 211, 229, 239, 241, 251, 269, 271, 281, 311, 331, 348, 349, 359, 379, 389, 401, 409, 419, 421, 431, 439, 449, 461, 479, 491, 499, 509, 521, 541, 569, 571 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`It appears that most of the terms of this sequence satisfy Fibonacci(n) == 1 (mod n). Also it seems that most of the terms are primes.`
	MATHEMATICA	`Select[Range[10^4], Mod[Fibonacci[ # ], # ] == Mod[DivisorSigma[1, # ], # ] &]`
	CROSSREFS	`Sequence in context: A056395 A053031 A018674 this_sequence A139785 A000638 A039824` `Adjacent sequences: A076515 A076516 A076517 this_sequence A076519 A076520 A076521`
	KEYWORD	`nonn`
	AUTHOR	`Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Oct 17 2002`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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