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A039952 formatted as a simple table:

n a(n)
1 2
2 3
3 4
4 5
5 6
6 7
7 12
8 15
9 20
10 30
11 31
12 60
13 61
14 84
15 105
16 140
17 210
18 211
19 420
20 421
21 422
22 423
23 840
24 841
25 1260
26 1261
27 1540
28 2310
29 2520
30 4620
31 4621
32 5460
33 5461
34 9240 

[2,3,4,5,6,7,12,15,20,30,31,60,61,84,105,140,210,
 211,420,421,422,423,840,841,1260,1261,1540,2310,
 2520,4620,4621,5460,5461,9240]

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Last modified December 21 10:15 EST 2009. Contains 171081 sequences.

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