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 A038749 #27 Feb 02 2021 04:32:40
%S A038749 0,0,0,2,16,96,510,2558,12282,57498,263421,1192480,5330078,23657520,
%T A038749 104106655,455993276,1984733843,8609546380,37164674383
%N A038749 Coefficients arising in the enumeration of configurations of linear chains.
%C A038749 In the notation of Nemirovsky et al. (1992), a(n), the n-th term of this sequence is p_{n,m}^{(l)} with m=1 and l=3. These numbers are given in Table II (p. 1093) in the paper. This sequence can be used for the calculation of sequence A047057 via Eq. (5) in the paper by Nemirovsky et al. (1992). (Note that, by equations (7b) in the paper, p_{n,m=1}^{(1)} = 0 for all n >= 1. Also, p_{n,m=1}^{(2)} = A038747(n) for n >= 1.) - _Petros Hadjicostas_, Jan 04 2019
%H A038749 A. M. Nemirovsky, K. F. Freed, T. Ishinabe, and J. F. Douglas, <a href="http://dx.doi.org/10.1007/BF01049010">Marriage of exact enumeration and 1/d expansion methods: lattice model of dilute polymers</a>, J. Statist. Phys., 67 (1992), 1083-1108; see Eq. 5 (p. 1090) and Eq. 7b (p. 1093).
%Y A038749 Cf. A033155, A038747, A047057.
%K A038749 nonn,more
%O A038749 1,4
%A A038749 _N. J. A. Sloane_, May 02 2000
%E A038749 The first three 0's in the sequence were added by _Petros Hadjicostas_, Jan 04 2019 to make it agree with Table II (p. 1093) and Eq. (5) (p. 1090) in the paper by Nemirovsky et al. (1992).
%E A038749 a(12)-a(19) from _Sean A. Irvine_, Feb 02 2021