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A187915 as a simple table

n a(n)
1 3
2 13
3 45
4 141
5 419
6 1201
7 3357
8 9209
9 24899
10 66549
11 176205
12 462917
13 1208163
14 3135449
15 8097597
16 20823921
17 53350531
18 136228445
19 346819437
20 880594813
21 2230476067
22 5637208449
23 14218682973
24 35797815913
25 89974587843
26 225790779205
27 565803994509
28 1415938252341
29 3539007315683
30 8835146000809
31 22033012367997
32 54889789955297

[3,13,45,141,419,1201,3357,9209,24899,66549,
 176205,462917,1208163,3135449,8097597,20823921,
 53350531,136228445,346819437,880594813,2230476067,
 5637208449,14218682973,35797815913,89974587843,
 225790779205,565803994509,1415938252341,
 3539007315683,8835146000809,22033012367997,
 54889789955297]

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Last modified April 23 12:44 EDT 2024. Contains 371913 sequences. (Running on oeis4.)