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A246474 as a simple table

na(n)
160
2132
3292
4644
51420
63132
76908
815236
933604
1074116
11163468
12360540
13795196
141753860
153868260
168531716
1718817292
1841502844
1991537404
20201892100
21445287044
22982111492
232166115084
244777517212
2510537145916
2623240406916
2751258331044

[60,132,292,644,1420,3132,6908,15236,33604,74116,
 163468,360540,795196,1753860,3868260,8531716,
 18817292,41502844,91537404,201892100,445287044,
 982111492,2166115084,4777517212,10537145916,
 23240406916,51258331044]