31179

Appears in sequences

• Odd elements (greater than 1) to right of central elements in 3-Pascal triangle A028262.at n=48A028274
• Riordan array (1/(1+x), x*(1-2*x)/(1+x)^2).at n=59A110522
• a(n) = C(n,6) + C(n,5) + C(n,4) + C(n,3) + C(n,2) + C(n,1).at n=18A115567
• Coefficients of a Ramanujan q-series.at n=33A143184
• Number of (w,x,y,z) with all terms in {1,...,n} and w+x=|x-y|+|y-z|.at n=39A212676