login

A331488 as a simple table

na(n)
10
20
30
41
51
62
73
86
910
1020
1136
1270
13134
14263
15513
161022
172030
184076
198203
2016614
2133738
2268833
23140796
24288989
25594621
261226781
272536532
285256303
2910913196
3022700682
3147299699
3298714362
33206323140
34431847121
35905074333
361899247187
373990145833
388392281473

[0,0,0,1,1,2,3,6,10,20,36,70,134,263,513,1022,
 2030,4076,8203,16614,33738,68833,140796,288989,
 594621,1226781,2536532,5256303,10913196,22700682,
 47299699,98714362,206323140,431847121,905074333,
 1899247187,3990145833,8392281473]