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A020697 Number of divisors of A019505(n). 2
1, 2, 3, 4, 6, 8, 10, 12, 16, 20, 24, 30, 36, 48, 60, 72, 84, 96, 120, 144, 168, 192, 224, 256, 320, 384, 448, 512, 576, 672, 768, 896, 1024, 1152, 1344, 1536, 1792, 2048, 2304, 2688, 3072, 3456, 4032, 4608, 5376, 6144, 6912, 8064, 9216, 10368, 11520, 12960 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Conjecture: all numbers of the form 3*2^n are in this sequence. - J. Lowell, Mar 12 2008 [This is false: 3*2^12 = 12288 is the smallest counterexample. - Klaus Brockhaus, Jul 24 2008]

LINKS

Table of n, a(n) for n=1..52.

CROSSREFS

Sequence in context: A191283 A200678 A088881 * A175381 A213623 A074715

Adjacent sequences:  A020694 A020695 A020696 * A020698 A020699 A020700

KEYWORD

nonn

AUTHOR

J. Lowell, May 11 2007, corrected Mar 20 2008

EXTENSIONS

More terms from Klaus Brockhaus, Jul 24 2008

STATUS

approved

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Last modified May 23 13:16 EDT 2019. Contains 323514 sequences. (Running on oeis4.)