26577

Appears in sequences

• Expansion of g.f. x*(1+x)^5/(1-x)^7.at n=9A069039
• Position where n (presumably) appears the last time in A107261, or 0 if n keeps appearing.at n=30A107262
• Greatest number m such that the fractional part of Pi^A153711(m) >= 1-(1/m).at n=7A153715
• Greatest number m such that the fractional part of Pi^A153712(n) >= 1-(1/m).at n=12A153716
• Series reversion of x + x^2 - x^5 - x^6 - x^7.at n=11A278077
• Number of n X n 0..1 arrays with every element unequal to 0, 2, 3, 4 or 8 king-move adjacent elements, with upper left element zero.at n=5A305277
• Number of nX6 0..1 arrays with every element unequal to 0, 2, 3, 4 or 8 king-move adjacent elements, with upper left element zero.at n=5A305279
• Crystal ball sequence for the lattice C_6.at n=4A305549
• a(n) = Sum_{k=0..n} sigma(k^2 + 1), where sigma(k) is the sum of divisors of k (A000203).at n=38A333172