22868

Appears in sequences

• a(n+1) = a(n) + a(n-1) + Fibonacci(n), with a(0) = 0 and a(1) = 1.at n=18A029907
• Coefficients of expansion of:p(t,y)=-Exp[t/4]/(-2 + y*Exp[t/4] + y*Exp[3*t/4]).at n=21A171770
• Shallow diagonal sums of A211226.at n=35A211228
• Numbers n such that n^2 + 1, (n+1)^2 + 1 and (n+2)^2 + 1 are divisible by a square.at n=3A218048
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 149", based on the 5-celled von Neumann neighborhood.at n=31A270319
• Number of polynomials of the form P(x,y) = 1 + (x+y-1) * Q(x,y) such that P(1,1) = n and both polynomials P and Q have nonnegative integer coefficients.at n=11A279196
• The first Zagreb index of the Aztec diamond AZ(n) (see the Ramanes et al. reference, Theorem 2.1).at n=25A292344
• Numbers that are the sum of eight fourth powers in exactly nine ways.at n=24A345841