A246263 - OEIS

%I #8 Aug 22 2014 16:49:21

%S 2,5,6,7,8,15,17,18,19,20,21,22,24,26,28,29,32,41,43,45,46,50,51,53,

%T 54,55,57,60,61,62,63,65,66,67,68,70,72,73,74,76,77,78,79,80,84,87,88,

%U 91,94,96,98,101,103,104,112,113,115,116,118,123,125,127,128,129,135,137,138,142,149,150

%N Numbers n such that A003961(n) is of the form 4k+3.

%C Equally: numbers n for which A048673(n) is even.

%C Also, after the first term (2), numbers n for which A243062(n) is odd.

%C Numbers that occur below the topmost row of square array A246259.

%H Antti Karttunen, <a href="/A246263/b246263.txt">Table of n, a(n) for n = 1..10001</a>

%o (Scheme, with _Antti Karttunen_'s IntSeq-library)

%o (define A246263 (MATCHING-POS 1 1 (lambda (n) (= 3 (modulo (A003961 n) 4)))))

%Y Complement: A246261.

%Y Positions of nonzeros in A246271.

%Y Inverse function: A246264.

%Y Cf. A003961, A048673, A246259, A243062, A246267.

%K nonn

%O 1,1

%A _Antti Karttunen_, Aug 21 2014