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A100773 a(1) = 1, a(2) = (2*1)/1 = 2. a(n+1) = (n+1)*a(n) divided by the largest prime divisor of a(n). 2
1, 2, 3, 4, 10, 12, 28, 32, 144, 480, 1056, 1152, 4992, 5376, 11520, 36864, 208896, 221184, 1400832, 1474560, 6193152, 19464192, 40697856, 42467328, 353894400, 1840250880, 3822059520, 21403533312, 88671780864, 91729428480, 568722456576 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

EXAMPLE

a(6) = 12, a(7) = (7*12)/3 = 28.

MATHEMATICA

nxt[{n_, a_}]:={n+1, (a(n+1))/FactorInteger[a][[-1, 1]]}; NestList[nxt, {1, 1}, 30][[All, 2]] (* Harvey P. Dale, Sep 20 2019 *)

CROSSREFS

Cf. A002639.

Sequence in context: A339577 A049548 A005456 * A250112 A193775 A131120

Adjacent sequences:  A100770 A100771 A100772 * A100774 A100775 A100776

KEYWORD

easy,nonn

AUTHOR

Amarnath Murthy, Nov 28 2004

EXTENSIONS

Extended by Ray Chandler, Dec 10 2004

STATUS

approved

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Last modified June 27 10:50 EDT 2022. Contains 354896 sequences. (Running on oeis4.)