A300774 - OEIS

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A300774 as a simple table

n	a(n)
1	0
2	19
3	102
4	735
5	10374
6	116954
7	1413931
8	17336190
9	210669938
10	2579232344
11	31507335039
12	385235115962
13	4709579663351
14	57576031578161
15	703919626655464
16	8605843851625144
17	105213106646598954
18	1286307937687623392

[0,19,102,735,10374,116954,1413931,17336190, 210669938,2579232344,31507335039,385235115962, 4709579663351,57576031578161,703919626655464, 8605843851625144,105213106646598954, 1286307937687623392]