login

A287954 as a simple table

na(n)
01
13
21
312
43
560
63
7252
815
91020
101
114068
1225
1316356
1431
1565532
16157
17262116
18159
191048100
20153
214193828
22153
2316776740
24153
2567108388
26921
27268433892
28921
291073739844
301017
314294965316
3258153
3317179867604
3457
3568719366268
36110521
37274877804608
38131023

[1,3,1,12,3,60,3,252,15,1020,1,4068,25,16356,31,
 65532,157,262116,159,1048100,153,4193828,153,
 16776740,153,67108388,921,268433892,921,
 1073739844,1017,4294965316,58153,17179867604,57,
 68719366268,110521,274877804608,131023]