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A083539
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a(n)=A000203[n].A000203[n+1]; product of sigma-values for consecutive integers.
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5
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3, 12, 28, 42, 72, 96, 120, 195, 234, 216, 336, 392, 336, 576, 744, 558, 702, 780, 840, 1344, 1152, 864, 1440, 1860, 1302, 1680, 2240, 1680, 2160, 2304, 2016, 3024, 2592, 2592, 4368, 3458, 2280, 3360, 5040, 3780, 4032, 4224, 3696, 6552, 5616, 3456, 5952
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| n=10, sigma[10]=18, sigma[11]=12,a(10)=216
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MATHEMATICA
| f[x_] := DivisorSigma[1, x] t=Table[f[w+1]*f[w], {w, 1, 128}]
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CROSSREFS
| Cf. A000203, A060781, A060780, A083538.
Sequence in context: A083543 A083538 A060781 * A066643 A140065 A115549
Adjacent sequences: A083536 A083537 A083538 * A083540 A083541 A083542
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KEYWORD
| nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), May 21 2003
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