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A162664 a(n) = sigma(n) + tau(n)^2. 2

%I

%S 2,7,8,16,10,28,12,31,22,34,16,64,18,40,40,56,22,75,24,78,48,52,28,

%T 124,40,58,56,92,34,136,36,99,64,70,64,172,42,76,72,154,46,160,48,120,

%U 114,88,52,224,66,129,88,134,58,184,88,184,96,106,64,312,66,112,140,176,100

%N a(n) = sigma(n) + tau(n)^2.

%C Row 2 of A162663.

%H Shawn A. Broyles, <a href="/A162664/b162664.txt">Table of n, a(n) for n = 1..10000</a>

%t Table[DivisorSigma[1, n] + DivisorSigma[0, n]^2, {n, 65}] (* _Robert A. Russell_, Apr 28 2018 *)

%o (PARI) a(n) = sigma(n) + numdiv(n)^2; \\ _Michel Marcus_, Apr 28 2018

%Y Cf. A000005, A000203, A035116, A162663.

%K nonn

%O 1,1

%A _Franklin T. Adams-Watters_, Jul 09 2009

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Last modified June 17 04:55 EDT 2021. Contains 345080 sequences. (Running on oeis4.)