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 A381834 #5 Mar 09 2025 12:57:29 %S A381834 2,5,12,17,24,36,65,72,84,112,132,160,208,257,264,276,304,324,352,400, %T A381834 516,544,592,704,784,896,1025,1032,1044,1072,1092,1120,1168,1284,1312, %U A381834 1360,1472,1552,1664,1856,2052,2080,2128,2240,2320,2432,2624,3088,3200,3392 %N A381834 k/16 is in this list if k > 4 and A053737(k) = A235127(k), i.e. if digitsum(k, 4) = valuation(k, 4). %t A381834 Select[Range[16, 60000, 16], DigitSum[#, 4] == IntegerExponent[#, 4] &] / 16 %Y A381834 Cf. A053737, A235127, A381837. %Y A381834 Cf. A381835 (base = 3), A381833 (base = 5). %K A381834 nonn,base %O A381834 1,1 %A A381834 _Peter Luschny_, Mar 09 2025