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Search: id:A083002
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| A083002 |
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Smallest oblong number having n distinct prime divisors. |
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+0
1
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| 0, 2, 6, 30, 210, 4290, 43890, 510510, 53501910, 1487683470, 64790866140, 530514844860, 126408523110870, 3425113062060690, 660393717163700520, 26657280574571657010, 3448055881024876471350
(list; graph; listen)
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OFFSET
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0,2
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EXAMPLE
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a(4)= 210 = 2*3*5*7.
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PROGRAM
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(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
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Cf. A002378.
Sequence in context: A136351 A071290 A093449 this_sequence A077176 A101178 A091456
Adjacent sequences: A082999 A083000 A083001 this_sequence A083003 A083004 A083005
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KEYWORD
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more,nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), May 30 2003
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EXTENSIONS
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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
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