110826

Appears in sequences

• a(n) = Sum_{j=0..n} j*Fibonacci(j).at n=18A014286
• a(n) = n^4 + n^3 + n.at n=18A100606
• a(n) = (n^4 + 46*n^3 - 169*n^2 + 146*n + 24)/24.at n=31A143059
• Expansion of g.f. 1 - 2*x*(-7 - 10*x + x^2)/(x - 1)^4.at n=27A152100
• a(0)=0, a(1)=1, a(2n)=18*a(n), a(2n+1)=a(2n)+1.at n=26A197352
• Indices of centered heptagonal numbers (A069099) which are also centered pentagonal numbers (A005891).at n=5A253621