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A083082 First subdiagonal of number array A083075. 6
1, 5, 61, 1065, 23801, 650893, 21120373, 794552657, 34040573425, 1637411510421, 87420145670573, 5131440522974329, 328542298690792681, 22789709877615373085, 1702810951672313083621, 136361486383932674632353 (list; graph; refs; listen; history; text; internal format)
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 A217820

Adjacent sequences:  A083079 A083080 A083081 * A083083 A083084 A083085

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Apr 23 2003

STATUS

approved

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Last modified July 16 09:13 EDT 2020. Contains 335784 sequences. (Running on oeis4.)