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A174958

a(n)=Sum((A008292(n - j, j) - C(n - j - 1, j))/2, j=0, [(n - 1)/2]).

0, 0, 0, 0, 1, 4, 15, 56, 214, 854, 3607, 16172, 76853, 386082, 2044198, 11373124, 66300473, 403939612, 2566116299, 16962629860, 116452790838, 828903740138, 6107712000563, 46521422681724, 365811331693305, 2965957618809246, 24767913121016790, 212803409969904264

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OFFSET

0,6

COMMENTS

Sequence A000800 minus the Lucas Fibonacci sum divided by two.

REFERENCES

Burton, David M.,Elementary number theory,McGraw Hill,N.Y.,2002,p 286, problem 23

LINKS

Table of n, a(n) for n=0..27.

MATHEMATICA

a = Table[Sum[(Eulerian[n -

j, j] - Binomial[n - j - 1, j])/2, {j, 0,