-2196

Appears in sequences

• a(n) = 1 - n^3.at n=13A024001
• Multiplicative with a(p^e) = 1 - p^3.at n=12A063453
• Sum at 45 degrees to horizontal in triangle of A081498.at n=52A081499
• A transform of the Fibonacci numbers.at n=40A099505
• a(n) = A062295(n) - A133743(n).at n=50A133744
• Expansion of (1/q) * ((chi(q^3) * chi(-q^6)) / (chi(q) * chi(-q^2)))^4 in powers of q where chi() is a Ramanujan theta function.at n=9A193522
• Expansion of (1/q) * chi(-q) * chi(-q^3) * chi(-q^6)^4 / chi(q)^4 in powers of q where chi() is a Ramanujan theta function.at n=9A193557
• Expansion of (1 - 2*x^2)/(1 + x)^4. Third column of Riordan triangle A248156.at n=26A248159
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 243", based on the 5-celled von Neumann neighborhood.at n=27A271003