1607520

Appears in sequences

• Sum of the squares of the a(n)-th and the (a(n)+1)st triangular numbers (A000217) is a perfect square.at n=7A065113
• Expansion of e.g.f. cosh(sqrt(2)*x) + exp(x)*(cosh(sqrt(2)*x) - 1).at n=17A088015
• Expansion of (1+4*x+x^2)/((1-x^2)*(1-2*x-x^2)); a Pellian-related sequence.at n=15A114696
• Sequence A001333 with last digits set to zero.at n=17A131037
• Number of dominating subsets with k vertices in all the graphs G(n) (n>=1) obtained by taking n copies of the path P_3 and identifying one of their endpoints (a star with n branches of length 2).at n=15A213667
• Row sums of triangle in A152719.at n=31A238375
• Expansion of (x^4+x^3-x^2+x)/(x^3+x^2-3*x+1).at n=17A265278
• Expansion of 2*x^2 / (x^3 + x^2 - 3x + 1).at n=17A293004