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 A208280 #9 Jul 13 2013 12:04:23 %S A208280 1,1,2,2,3,3,4,3,4,4,4,4,6,6,4,3,4,5,6,5,5,6,7,9,3,3,4,4,5,6,4,2,4,5, %T A208280 4,5,5,7,7,9,5,5,7,8,8,6,6,10,7,4,4,4,6,7,6,4,5,7,7,10,6,7,6,5,6,6,6, %U A208280 8,7,8,7,8,7,9,5,4,5,6,7,6,5,5,6,7,7,6 %N A208280 Number of distinct values in n-th row of Pascal's triangle mod 10 (A008975). %H A208280 Reinhard Zumkeller, <a href="/A208280/b208280.txt">Table of n, a(n) for n = 0..10000</a> %e A208280 Smallest numbers m such that a(m) = n, m = 1,..,9: %e A208280 m | distinct terms in A008975(m,*) | a(m) %e A208280 -----+----------------------------------+------- %e A208280 0 | [1] | 1 %e A208280 2 | [1, 2] | 2 %e A208280 4 | [1, 4, 6] | 3 %e A208280 6 | [0, 1, 5, 6] | 4 %e A208280 17 | [0, 1, 6, 7, 8] | 5 %e A208280 12 | [0, 1, 2, 4, 5, 6] | 6 %e A208280 22 | [0, 1, 2, 3, 4, 5, 6] | 7 %e A208280 43 | [0, 1, 3, 4, 5, 6, 8, 9] | 8 %e A208280 23 | [0, 1, 3, 4, 5, 6, 7, 8, 9] | 9 %e A208280 47 | [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] | 10 %o A208280 (Haskell) %o A208280 import Data.List (nub) %o A208280 a208280 = length . nub . a008975_row %K A208280 nonn %O A208280 0,3 %A A208280 _Reinhard Zumkeller_, Feb 25 2012