A233446 - OEIS

A233446

a(n) = ((2n-1)^(2n+1) + (2n+1)^(2n-1))/(2n)^2 = A154682(n)/(2n)^2 for n > 0.

%I #8 Jun 06 2021 09:05:00

%S 1,23,2637,705259,337390073,252186614847,271082082053317,

%T 396049017137512403,754792662169555947633,1818644980834260579498343,

%U 5405067064522549127719680701,19423396040054801221090342470843,83016890560608261435356904433668457,416213066932582983199004231480676255119,2419095491735191624607023665166934072373813

%N a(n) = ((2n-1)^(2n+1) + (2n+1)^(2n-1))/(2n)^2 = A154682(n)/(2n)^2 for n > 0.

%F a(n) = ((2n-1)^(2n+1) + (2n+1)^(2n-1))/(2n)^2; n > 0.

%t Table[((2 n - 1)^(2 n + 1) + (2 n + 1)^(2 n - 1))/(2 n)^2, {n, 1, 15}]

%Y Cf. A154682.

%K nonn

%O 1,2

%A _Alexander Adamchuk_, Dec 10 2013