login

A026023 as a simple table

na(n)
01
12
24
38
415
530
656
7112
8210
9420
10792
111584
123003
136006
1411440
1522880
1643758
1787516
18167960
19335920
20646646
211293292
222496144
234992288
249657700
2519315400
2637442160
2774884320
28145422675
29290845350
30565722720
311131445440
322203961430
334407922860

[1,2,4,8,15,30,56,112,210,420,792,1584,3003,6006,
 11440,22880,43758,87516,167960,335920,646646,
 1293292,2496144,4992288,9657700,19315400,37442160,
 74884320,145422675,290845350,565722720,1131445440,
 2203961430,4407922860]