[0,1,3,6,10,15,21,28,36,44,54,66,80,96,113,132,
153,176,200,225,252,282,316,352,390,431,475,522,
570,620,673,728,788,851,918,988,1062,1139,1218,
1301,1388,1477,1571,1669,1773,1882,1996,2113,2232,
2356,2485,2618,2755,2897,3045,3198,3356,3518,3685,
3859]
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