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A083083 A diagonal of number array A083075. 3
1, 7, 97, 1831, 43393, 1242375, 41818561, 1620979687, 71191804801, 3496805826823, 190053352702753, 11329044782441127, 735151931535979777, 51600331868857972231, 3896042468112362132353, 314921475287825567805799 (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+2)*(2n+7)^n + 1)/(n+3).

PROG

(MAGMA) [((n+2)*(2*n+7)^n+1)/(n+3): n in [0..20]]; // Vincenzo Librandi, Nov 12 2011

CROSSREFS

Cf. A083082, A083084.

Sequence in context: A218669 A188441 A178808 * A022007 A174516 A058805

Adjacent sequences:  A083080 A083081 A083082 * A083084 A083085 A083086

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Apr 23 2003

STATUS

approved

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Last modified June 3 05:28 EDT 2020. Contains 334798 sequences. (Running on oeis4.)