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 A173496 #2 Mar 30 2012 18:40:51 %S A173496 1,2,4,9,25,85,346,1589,7846,40567,216327,1180227,6554627,36939883, %T A173496 210777514,1215644593,7077255068,41546269583,245708229893, %U A173496 1462853468378,8761861115930,52767463557770 %N A173496 Partial sums of A005036. %C A173496 Partial sums of number of ways of dissecting a polygon into n quadrilaterals. The subsequence of primes in this partial sum begins: 2, 6554627, 36939883, 1215644593. %F A173496 a(n) = SUM[i=1..n] A005036(i). %e A173496 a(22) = 1 + 1 + 2 + 5 + 16 + 60 + 261 + 1243 + 6257 + 32721 + 175760 + 963900 + 5374400 + 30385256 + 173837631 + 1004867079 + 5861610475 + 34469014515 + 204161960310 + 1217145238485 + 7299007647552 + 44005602441840. %Y A173496 Cf. A005036, A005419, A004127, A005038, A005040, A000207. %K A173496 nonn %O A173496 1,2 %A A173496 _Jonathan Vos Post_, Feb 19 2010