A083084 A diagonal of number array A083075.

1, 9, 141, 2893, 73081, 2200977, 77189509, 3095295861, 139872233073, 7039013063065, 390656716635901, 23714578436644509, 1563646420268423401, 111315499088924632353, 8511391223995285616373, 695805743909499121660357

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..300

Formula

a(n) = ((n+3)*(2n+9)^n + 1)/(n+4).

Prog

(Magma) [((n+3)*(2*n+9)^n+1)/(n+4): n in [0..20]]; // Vincenzo Librandi, Nov 12 2011

Crossrefs

Cf. A083083, A083082.

Sequence in context: A137059 A263966 A371365 * A187402 A363478 A303147

Adjacent sequences: A083081 A083082 A083083 * A083085 A083086 A083087

Keyword

easy,nonn

Author

Paul Barry, Apr 23 2003

Status

approved