22885

Appears in sequences

• Base-4 digits are, in order, the first n terms of the periodic sequence with initial period 1,1,2.at n=7A037529
• a(1)=1. a(n) = a(n-1) + (sum of the earlier terms {among terms a(1) through a(n-1)} which are coprime to n).at n=12A127075
• Numbers k such that k and k^2 use only the digits 2, 3, 5, 7 and 8.at n=6A137083
• Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1101-0111 pattern in any orientation.at n=14A147168
• Number of nondecreasing arrangements of n+2 numbers in 0..4 with each number being the sum mod 5 of two others.at n=22A183907
• Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 0,1,2,3,4,5,6 for x=0,1,2,3,4,5,6.at n=8A197546
• Numbers n such that the decimal digits of n^2 are all prime.at n=16A275971
• Expansion of Product_{k>=1} 1/(1+x^k)^(k^2) in powers of x.at n=18A284896
• a(1) = 1; a(n) = 1 + a(n-1) + Sum_{k=2..n} a(floor(n/k)).at n=41A351621
• Consecutive states of the linear congruential pseudo-random number generator for Smalltalk-80 when started at 1.at n=28A384220