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A083080 Main diagonal of number array A083075. 4
1, 3, 33, 547, 11713, 309411, 9763393, 359046339, 15096500481, 714852041923, 37660464739681, 2185503641764323, 138548894120306881, 9527726662032987747, 706481006206076565633, 56192761405186331759491 (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*(2n+3)^n + 1)/(n+1).

PROG

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

CROSSREFS

Cf. A083081, A083082.

Sequence in context: A291818 A209245 A092170 * A002916 A009659 A144756

Adjacent sequences:  A083077 A083078 A083079 * A083081 A083082 A083083

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Apr 23 2003

STATUS

approved

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Last modified July 11 07:06 EDT 2020. Contains 335609 sequences. (Running on oeis4.)