login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

A024690 as a simple table

na(n)
12
20
30
42
55
67
710
80
90
102
115
127
1310
1413
1515
1618
1720
1823
1926
202
215
227
2310
2413
2515
2618
2720
2823
2926
3028
3131
3234
3336
3439
3543
3649
3754
3859
3965
4015
4118
4220
4323
4426
4528
4631
4734
4836
4939
5041
5144
5247
5349
5452
5554
5659
5765
5869
5975
6081
6185
6291
6395
64101
65107
66111
67117
68123
69127
7039
7141
7244
7347
7449
7552

[2,0,0,2,5,7,10,0,0,2,5,7,10,13,15,18,20,23,26,2,
 5,7,10,13,15,18,20,23,26,28,31,34,36,39,43,49,54,
 59,65,15,18,20,23,26,28,31,34,36,39,41,44,47,49,
 52,54,59,65,69,75,81,85,91,95,101,107,111,117,123,
 127,39,41,44,47,49,52]