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 A011778 Numbers n where A011776(n) grows. 4

%I

%S 2,6,12,24,36,40,45,48,60,72,80,90,120,144,180,240,360,480,630,672,

%T 720,1080,1120,1260,1344,1440,1890,2016,2160,2240,2520,2880,3024,3360,

%U 3780,4032,4320,5040,6048

%N Numbers n where A011776(n) grows.

%C Equivalently, 2 along with numbers A092427(n) where A092427(n) > A092427(n-1), for n > 0. - _Derek Orr_, Apr 16 2015

%C Is 45 the only odd number in this sequence? - _Derek Orr_, Apr 16 2015

%C a(184) = 212837625 and a(311) = 638512875 are the only other odd terms < 10^11. - _Charlie Neder_, Jan 27 2019

%D Ivan Niven, Herbert S. Zuckerman and Hugh L. Montgomery, An Introduction to the Theory Of Numbers, Fifth Edition, Wiley NY 1991.

%D J. Roberts, Lure of the Integers, Math. Assoc. America, 1992, p. 251.

%H Charlie Neder, <a href="/A011778/b011778.txt">Table of n, a(n) for n = 1..697</a> [Terms < 10^11; First 100 terms from _T. D. Noe_]

%H <a href="/index/Fa#factorial">Index entries for sequences related to factorial numbers</a>

%F a(n) = A061769(n)+1.

%F a(n) = A092427(A061770(n)). - _Derek Orr_, Apr 16 2015

%Y Cf. A011776, A011777, A133481, A092427.

%K nonn,nice,easy

%O 1,1

%A _Robert G. Wilson v_

%E Corrected by _Vladeta Jovovic_, Dec 01 2002

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Last modified October 18 15:21 EDT 2019. Contains 328162 sequences. (Running on oeis4.)