login

A216215 as a simple table

na(n)
01
12
22
36
412
528
654
7118
8230
9490
10968
111980
123978
138066
1416100
1532494
1664994
17130468
18261000
19523092
201046292
212094812
224189704
238383732
2416768206
2533545152
2667090578
27134199252
28268399910
29536834026
301073671504
312147411556
324294826718
338589792856
3417179592372
3534359455674

[1,2,2,6,12,28,54,118,230,490,968,1980,3978,8066,
 16100,32494,64994,130468,261000,523092,1046292,
 2094812,4189704,8383732,16768206,33545152,
 67090578,134199252,268399910,536834026,1073671504,
 2147411556,4294826718,8589792856,17179592372,
 34359455674]