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A143711 (1, 2, 3, 2^2, 5, 2*3, 7, 2^3, 3^2, 2*5, 11, 2^2*3, 13, 2*7, 3*5,..) becomes (1*2*3, 2*2*5, 2*3*7, 2*3*3, 2*2*5, 11*2*2, 3*13*2, 7*3*5,..). 1
6, 20, 42, 18, 20, 44, 78, 105, 136, 12, 76, 105, 506, 18, 20, 117, 28, 174, 310, 165, 170, 28, 222, 114, 78, 410, 903, 44, 30, 2162, 24, 28, 30, 68, 1378, 45, 66, 399, 3422, 12, 610, 186, 84, 130, 2211, 68, 138, 2485, 18, 292, 555, 8, 1463, 78, 632, 60, 6806, 12 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..58.

EXAMPLE

a(8)=7*3*5=105.

a(9)=2*4*17=136.

a(10)=2*3*2=12.

a(11)=19*2*2=76.

a(12)=5*3*7=105.

a(13)=2*11*23=506,

etc.

CROSSREFS

Cf. A141287, A141261, A136735.

Sequence in context: A031068 A031052 A097811 * A077539 A002943 A068377

Adjacent sequences:  A143708 A143709 A143710 * A143712 A143713 A143714

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Nov 13 2008

EXTENSIONS

a(43) corrected by R. J. Mathar, Apr 14 2010

STATUS

approved

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Last modified October 15 03:09 EDT 2019. Contains 328025 sequences. (Running on oeis4.)