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 A178467 #19 Apr 11 2024 10:10:04 %S A178467 0,3,6,9,28,30,18,35,32,36,50,66,72,91,154,120,96,187,144,190,100,147, %T A178467 176,184,288,275,208,270,224,261,180,248,288,297,442,420,324,407,342, %U A178467 390,320,410,462,473,660,630,506,611,528,588,450,561,624,636,864,825,672,798,696,767,480,610,682,693,960,910,726,871,748,828,560,710,792,803,1110,1050,836,1001,858,948,560,729,820,830,1176,1105,860,1044 %N A178467 a(n) = n * (number of letters in n in Italian). %C A178467 a(0) and a(3) are the only terms such that a(k) = k^2. %F A178467 a(n) = A001477(n)*A026858(n). %e A178467 a(5)=30 since 5="cinque" has 6 letters in Italian and 5*6=30. %e A178467 a(81)=729 since 81="ottantuno" has 9 letters. %Y A178467 Cf. A001477, A026858. %K A178467 nonn,word %O A178467 0,2 %A A178467 _Carmine Suriano_, Dec 23 2010 %E A178467 Edited by _N. J. A. Sloane_, Dec 23 2010 %E A178467 a(81) corrected by _Georg Fischer_, Apr 11 2024