21811

Appears in sequences

• Number of non-Fibonacci parts in the last section of the set of partitions of n.at n=40A144118
• Numbers n such that the Collatz iterations for n and n + 1 have the same length (A078417) but do not meet a certain condition. (See comments.)at n=36A274410
• Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=4A300031
• Number of nX5 0..1 arrays with every element equal to 0, 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=4A300032
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=40A300035
• Numbers that are the sum of seven fourth powers in exactly six ways.at n=27A345828
• a(n) = Sum_{j=1..n} Sum_{i=1..n} (j mod i).at n=45A367379