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 A362587 #6 May 10 2023 11:50:11 %S A362587 1,2,28,968,62512,6487712,987533248,207257057408,57359688424192, %T A362587 20240182500956672,8869195638810631168,4725115451770644482048, %U A362587 3007722163880719988764672,2254432760608214922012434432,1965374406868398554356767244288,1971745067277979562424894483365888 %N A362587 a(n) = 2^n * A094088(n). Row sums of A362586. %o A362587 (SageMath) %o A362587 def A362587(n) : %o A362587 @cached_function %o A362587 def f(n) : %o A362587 if n == 0 : return 1 %o A362587 if n % 2 != 0 : return 0 %o A362587 return sum(f(k) * binomial(n, k) for k in range(n)[::2]) %o A362587 return 2^n * f(2 * n) %o A362587 print([A362587(n) for n in range(16)]) %Y A362587 Cf. A094088, A362586. %K A362587 nonn %O A362587 0,2 %A A362587 _Peter Luschny_, Apr 26 2023