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A083083 A diagonal of number array A083075. 3

%I

%S 1,7,97,1831,43393,1242375,41818561,1620979687,71191804801,

%T 3496805826823,190053352702753,11329044782441127,735151931535979777,

%U 51600331868857972231,3896042468112362132353,314921475287825567805799

%N A diagonal of number array A083075.

%H Vincenzo Librandi, <a href="/A083083/b083083.txt">Table of n, a(n) for n = 0..300</a>

%F a(n) = ((n+2)*(2n+7)^n + 1)/(n+3).

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

%Y Cf. A083082, A083084.

%K easy,nonn

%O 0,2

%A _Paul Barry_, Apr 23 2003

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Last modified July 10 13:04 EDT 2020. Contains 335576 sequences. (Running on oeis4.)