id:A055097 - OEIS Search Results

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Number of divisors for each term in the triangle A055096. It is 2 for primes (all of the form 4k+1).

+0
3

2, 4, 2, 2, 6, 3, 4, 2, 4, 2, 2, 8, 6, 6, 2, 6, 2, 4, 4, 4, 4, 4, 6, 2, 10, 2, 9, 2, 4, 4, 12, 2, 4, 6, 8, 4, 2, 8, 2, 6, 4, 8, 2, 6, 2, 4, 4, 8, 2, 4, 2, 8, 4, 4, 4, 4, 6, 6, 12, 3, 18, 2, 10, 9, 6, 4, 8, 2, 4, 4, 4, 4, 4, 2, 8, 2, 8, 2, 2, 12, 4, 6, 4, 8, 6, 12, 2, 8, 2, 12, 4, 4, 2, 12, 2, 8, 6, 4, 3 (list; table; graph; listen)

	OFFSET	`1,1`
	FORMULA	`with(numtheory, tau); a(n) = tau(sum2distinct_squares_array(n))`
	CROSSREFS	`Cf. A055132.` `Sequence in context: A117007 A144049 A058384 this_sequence A054507 A054240 A082864` `Adjacent sequences: A055094 A055095 A055096 this_sequence A055098 A055099 A055100`
	KEYWORD	`nonn,tabl`
	AUTHOR	`Antti Karttunen Apr 04 2000`

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

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