A083082 First subdiagonal of number array A083075.

1, 5, 61, 1065, 23801, 650893, 21120373, 794552657, 34040573425, 1637411510421, 87420145670573, 5131440522974329, 328542298690792681, 22789709877615373085, 1702810951672313083621, 136361486383932674632353

Offset

0,2

Links

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

Formula

a(n) = ((n+1)*(2n+5)^n + 1)/(n+2).

Mathematica

Table[((n+1)(2n+5)^n+1)/(n+2), {n, 0, 20}] (* Harvey P. Dale, Oct 06 2019 *)

Prog

(Magma) [((n+1)*(2*n+5)^n+1)/(n+2): n in [0..20]]; // Vincenzo Librandi, Nov 12 2011

Crossrefs

Cf. A083080, A083083.

Sequence in context: A134282 A146760 A294024 * A213110 A298695 A352238

Adjacent sequences: A083079 A083080 A083081 * A083083 A083084 A083085

Keyword

easy,nonn

Author

Paul Barry, Apr 23 2003

Status

approved