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A056196 Numbers n such that A055229(n) = 2. 4
8, 24, 32, 40, 56, 72, 88, 96, 104, 120, 128, 136, 152, 160, 168, 184, 200, 224, 232, 248, 264, 280, 288, 296, 312, 328, 344, 352, 360, 376, 384, 392, 408, 416, 424, 440, 456, 472, 480, 488, 504, 512, 520, 536, 544, 552, 568, 584, 600, 608, 616, 632, 640 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

By definition, the largest square divisor and squarefree part of these numbers have GCD = 2.

Different from A036966. E.g. 81 is not here because A055229(81)=1.

FORMULA

a(n) = 2*A081706(2n-1) + 4 = 2*A081706(2n) + 2 = 4*A072939(n) - 4 . - DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Feb 22 2004

EXAMPLE

88 is here because 88 = 4*2*11, K = 2, F = 11 and g = A055229(88) = 2.

CROSSREFS

Cf. A036966, A055229.

Equals 8 * A003159(n) and 4 * A036554(n).

Sequence in context: A096727 A028660 A028644 * A044069 A028628 A128690

Adjacent sequences:  A056193 A056194 A056195 * A056197 A056198 A056199

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Aug 02 2000

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Last modified February 15 15:20 EST 2012. Contains 205823 sequences.