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 A295022 #5 Nov 13 2017 22:14:09 %S A295022 27,2744,3375,12167,17576,27000,157464,166375,175616,250047,274625, %T A295022 300763,474552,753571,1157625,1367631,1771561,2000376,2352637,2460375, %U A295022 2571353,2744000,3176523,3375000,4330747,4657463,4741632,5177717,5451776,6644672,7645373,11543176,12167000 %N A295022 Cubes whose largest digit is 7. %C A295022 For any term a(n), all numbers of the form a(n)*10^3k, k >= 0, are in this sequence. We could call "primitive" the terms not of this form, i.e., those without trailing '0'. %F A295022 a(n) = A294997(n)^3. %e A295022 27 is in the sequence because it is a cube, 27 = 3^3, and its largest digit is 7. %o A295022 (PARI) for(n=1,250, vecmax(digits(n^3))==7 &&print1(n^3,",")) %Y A295022 Cf. A294997 (the corresponding cube roots); A278936, A294663, A295025, A295021, A295023, A295024 (same for digit 3 .. 9); A295017 (same for squares). %Y A295022 Cf. A000578 (the cubes). %K A295022 nonn,base %O A295022 1,1 %A A295022 _M. F. Hasler_, Nov 13 2017