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 A342252 #5 Mar 07 2021 12:17:18 %S A342252 1,9,36,93,198,378,624,927,1341,1849,2412,3159,4074,4950,5904,7032, %T A342252 8010,9018,10488,11970,13356,15108,16848,18315,20085,22257,24444, %U A342252 26671,28674,30510,32208,33282,34974,37590,39384,40986,43668,45468,46512,49620,53298,55890,59304,62442 %N A342252 Number of ways to write n as an ordered sum of nine powers of 2. %F A342252 G.f.: ( Sum_{k>=0} x^(2^k) )^9. %t A342252 nmax = 52; CoefficientList[Series[Sum[x^(2^k), {k, 0, Floor[Log[2, nmax]] + 1}]^9, {x, 0, nmax}], x] // Drop[#, 9] & %Y A342252 Cf. A000079, A023359, A073267, A151759, A151760, A151761, A151762, A209229, A342249, A342250, A342251, A342254. %K A342252 nonn %O A342252 9,2 %A A342252 _Ilya Gutkovskiy_, Mar 07 2021