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 A137603 #12 Jun 01 2025 14:44:27 %S A137603 1,14,1253,2261,2622,13145,13630,20146,24035,30362,31416,42504,50424, %T A137603 63240,112281,117124,126005,150360,161160,225153,252126,262105,318021, %U A137603 341630,510632,611523,723104,1071521,1131190,1153262,1200626,1242108 %N A137603 Numbers m such that product of factorials of digits of m equals sigma(m). %H A137603 Giovanni Resta, <a href="/A137603/b137603.txt">Table of n, a(n) for n = 1..1000</a> %e A137603 sigma(10230248)=1!*0!*2!*3!*0!*2!*4!*8! so 10230248 is in the sequence. %t A137603 Select[Range[1250000],Times@@(IntegerDigits[#]!)==DivisorSigma[1,#]&] (* _James C. McMahon_, Jun 01 2025 *) %Y A137603 Cf. A066457, A066459, A000203. %K A137603 easy,nonn,base,less %O A137603 1,2 %A A137603 _Farideh Firoozbakht_, Apr 11 2008