A198409 - OEIS

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A198409

Positions in sequences A198384, A198385 and A198386 to indicate triples of squares in arithmetic progression, that are not multiples of earlier triples.

1, 3, 5, 7, 10, 13, 15, 23, 24, 26, 30, 35, 39, 42, 45, 47, 51, 54, 62, 69, 70, 72, 83, 84, 88, 97, 98, 102, 107, 114, 115, 124, 126, 129, 136, 141, 142, 143, 156, 157, 167, 169, 172, 177, 181, 188, 191, 201, 205, 208, 214, 218, 229, 230, 237, 244, 249, 253 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`A198435(n) = A198384(a(n)); A198439(n) = A198388(a(n));` `A198436(n) = A198385(a(n)); A198440(n) = A198389(a(n));` `A198437(n) = A198386(a(n)); A198441(n) = A198390(a(n));` `A198438(n) = A198387(a(n)).`
	LINKS	`Table of n, a(n) for n=1..58.` `_Reinhard Zumkeller_, Table of initial values`
	FORMULA	`A008966(A050873(A198439(n),A050873(A198440(n),A050873(A198441(n))))) = 1.`
	PROG	`(Haskell)` `import Data.List (elemIndices)` `a198409 n = a198409_list !! (n-1)` `a198409_list = map (+ 1) $ elemIndices 1 $ map a008966 $` `zipWith gcd a198384_list $ zipWith gcd a198385_list a198386_list`
	CROSSREFS	`Sequence in context: A075782 A050090 A152004 * A213510 A130257 A186148` `Adjacent sequences: A198406 A198407 A198408 * A198410 A198411 A198412`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller, Oct 25 2011`
	STATUS	`approved`

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Last modified June 19 13:09 EDT 2013. Contains 226405 sequences.