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A268644 as a simple table

n a(n)
0 -1
1 -2
2 15
3 74
4 199
5 414
6 743
7 1210
8 1839
9 2654
10 3679
11 4938
12 6455
13 8254
14 10359
15 12794
16 15583
17 18750
18 22319
19 26314
20 30759
21 35678
22 41095
23 47034
24 53519
25 60574
26 68223
27 76490
28 85399
29 94974
30 105239
31 116218
32 127935
33 140414
34 153679
35 167754
36 182663
37 198430
38 215079
39 232634
40 251119

[-1,-2,15,74,199,414,743,1210,1839,2654,3679,4938,
 6455,8254,10359,12794,15583,18750,22319,26314,
 30759,35678,41095,47034,53519,60574,68223,76490,
 85399,94974,105239,116218,127935,140414,153679,
 167754,182663,198430,215079,232634,251119]

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Last modified October 17 22:48 EDT 2018. Contains 316297 sequences. (Running on oeis4.)