This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A246590 #23 Aug 31 2024 04:27:50 %S A246590 6,12,14,22,24,28,30,38,44,46,48,54,56,60,62,70,76,78,86,88,92,94,96, %T A246590 102,108,110,112,118,120,124,126,134,140,142,150,152,156,158,166,172, %U A246590 174,176,182,184,188,190,192,198,204,206,214,216,220,222,224,230,236 %N A246590 Even numbers whose odd part is of the form 4m+3; Numbers missing from A241816. %C A246590 Numbers with bit-0 in their binary representation zero, and whose least significant 1-bit is neighbored (to the left) by another 1-bit, in other words, all even terms of A091067. - _Antti Karttunen_, Feb 20 2015 %C A246590 The asymptotic density of this sequence is 1/4. - _Amiram Eldar_, Aug 31 2024 %H A246590 Alois P. Heinz, <a href="/A246590/b246590.txt">Table of n, a(n) for n = 1..10000</a> %F A246590 a(n) = 2*A091067(n). - _Antti Karttunen_, Feb 20 2015 %t A246590 Select[2 * Range[120], Mod[# / 2^IntegerExponent[#, 2], 4] == 3 &] (* _Amiram Eldar_, Aug 31 2024 *) %o A246590 (PARI) is(k) = !(k % 2) && (k >> valuation(k, 2)) % 4 == 3; \\ _Amiram Eldar_, Aug 31 2024 %Y A246590 Complement of A241816. %Y A246590 Cf. A091067. %K A246590 nonn,base %O A246590 1,1 %A A246590 _N. J. A. Sloane_, Sep 03 2014 %E A246590 More terms from _Alois P. Heinz_, Sep 07 2014 %E A246590 New definition added to name by _Antti Karttunen_, Feb 20 2015