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A083081 First super-diagonal of number array A083075. 3

%I

%S 1,13,229,4921,128841,4022341,146450893,6103787761,286833509137,

%T 15011892880381,866190689012661,54637591044108073,3740820141248285785,

%U 276304073198956644661,21900911192388373534621

%N First super-diagonal of number array A083075.

%H Vincenzo Librandi, <a href="/A083081/b083081.txt">Table of n, a(n) for n = 1..300</a>

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

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

%Y Cf. A083080, A083082.

%K easy,nonn

%O 1,2

%A _Paul Barry_, Apr 23 2003

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Last modified September 26 03:19 EDT 2021. Contains 347664 sequences. (Running on oeis4.)