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A083002
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Smallest oblong number having n distinct prime divisors.
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1
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0, 2, 6, 30, 210, 4290, 43890, 510510, 53501910, 1487683470, 64790866140, 530514844860, 126408523110870, 3425113062060690, 660393717163700520, 26657280574571657010, 3448055881024876471350, 308480161111936386482910
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| a(18) <= 32521466098360753728404190. - Donovan Johnson, Oct 05 2011
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EXAMPLE
| a(4)= 210 = 2*3*5*7.
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PROG
| (PARI) {odf(m) = print1(0", "); for(n=1, m, k=1; while(omega(k*(k+1))!=n, k++); print1(k*(k+1)", ")) }
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CROSSREFS
| Cf. A002378, A059958.
Sequence in context: A071290 A185693 A093449 * A192929 A077176 A101178
Adjacent sequences: A082999 A083000 A083001 * A083003 A083004 A083005
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KEYWORD
| nonn
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AUTHOR
| Jason Earls (zevi_35711(AT)yahoo.com), May 30 2003
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EXTENSIONS
| More terms from Don Reble (djr(AT)nk.ca), Jun 03 2003
a(15)-a(16) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Apr 26 2009
a(17) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Sep 15 2010
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