A083084 A diagonal of number array A083075.
1, 9, 141, 2893, 73081, 2200977, 77189509, 3095295861, 139872233073, 7039013063065, 390656716635901, 23714578436644509, 1563646420268423401, 111315499088924632353, 8511391223995285616373, 695805743909499121660357
Offset: 0
Links
- Vincenzo Librandi, Table of n, a(n) for n = 0..300
Programs
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Magma
[((n+3)*(2*n+9)^n+1)/(n+4): n in [0..20]]; // Vincenzo Librandi, Nov 12 2011
Formula
a(n) = ((n+3)*(2n+9)^n + 1)/(n+4).