A278539 - OEIS

%I #6 Nov 24 2016 09:29:39

%S 1,2,1,3,2,4,1,5,2,6,3,7,1,8,2,9,4,10,1,11,3,12,5,13,2,14,1,15,6,16,2,

%T 17,4,18,7,19,3,20,1,21,8,22,2,23,5,24,9,25,1,26,3,27,10,28,4,29,6,30,

%U 11,31,2,32,1,33,12,34,2,35,7,36,13,37,3,38,5,39,14,40,1,41,8,42,15,43,4,44,2,45,16,46,1,47,9,48,17,49,6,50,3,51,18,52,2,53

%N a(n) = index of the column where n is located in array A278505.

%C Ordinal transform of A278538 (as the rows of A278505 are strictly growing).

%H Antti Karttunen, <a href="/A278539/b278539.txt">Table of n, a(n) for n = 1..10707</a>

%F a(n) = 1 + A278529(n).

%o (Scheme) (define (A278539 n) (+ 1 (A278529 n)))

%Y One more than A278529.

%Y Cf. A278505, A278538, A278537.

%K nonn

%O 1,2

%A _Antti Karttunen_, Nov 23 2016