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 A100057 #6 Mar 30 2012 17:29:19 %S A100057 2,4,8,12,18,24,30,40,50,60,70,80,96,112,128,144,160,176,192,208,234, %T A100057 260,286,312,338,364,390,416,442,468,494,520,546,588,630,672,714,756, %U A100057 798,840,882,924,966,1008,1050,1092,1134,1176,1218,1260,1302,1344,1386 %N A100057 Sum of absolute differences of p(n) defined in A054065, oriented around a clock. %F A100057 Arrange p(n) of A054065 around a clock. a(n) = sum of absolute differences between terms. Alternatively, take the absolute difference between left and rightmost terms of p(n), A054065; and add to A100056(n). %e A100057 a(4) = 8 since p(4) of A054065 = 2 4 1 3. Placing the terms in circular fashion and taking absolute differences: 2, 3, 2, 1; sum = 8. %Y A100057 Cf. A100056. %K A100057 nonn %O A100057 2,1 %A A100057 _Gary W. Adamson_, Oct 31 2004 %E A100057 Edited and extended by _Ray Chandler_, Apr 18 2009