21223

Appears in sequences

• Numbers that are the sum of 8 positive 9th powers.at n=12A003397
• Every suffix is prime and contains no 0 digits in base 4 (written in base 4).at n=10A024779
• Number of unimodal partitions/compositions of n into distinct terms.at n=40A072706
• Number of rooted trees with total weight n, where the weight of a node at height k is k (with the root considered to be at level 0).at n=34A117356
• Start with 1 and repeatedly reverse the digits and add 37 to get the next term.at n=18A118633
• a(n) = n^3 - floor(n/3)^3.at n=28A213039
• Number of partitions p of n such that (maximal multiplicity of the parts of p) >= (number of distinct parts of p).at n=40A240308
• a(n) = (n+1)^3 - n^2.at n=27A261893
• Number of nX6 0..1 arrays with every element unequal to 0, 1 or 2 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=13A317762
• Rectangular array read by downwards antidiagonals: row k lists the numbers whose Lucas-Fibonacci representation has k terms.at n=53A353659