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A145599 as a simple table

na(n)
41
55
65
715
835
915
1035
11140
12140
1335
1470
15420
16720
17420
1870
19126
201050
212700
222700
231050
24126
25210
262310
278250
2812375
298250
302310
31210
32330
334620
3421780
3545375
3645375
3721780
384620
39330
40495
418580
4251480
43141570
44196625
45141570
4651480
478580
48495
49715
5015015

[1,5,5,15,35,15,35,140,140,35,70,420,720,420,70,
 126,1050,2700,2700,1050,126,210,2310,8250,12375,
 8250,2310,210,330,4620,21780,45375,45375,21780,
 4620,330,495,8580,51480,141570,196625,141570,
 51480,8580,495,715,15015]