20004

Appears in sequences

• Numbers n with property that n is a substring of its base 5 representation.at n=14A038105
• McKay-Thompson series of class 28D for Monster.at n=34A058609
• Numbers k such that the number of primes between k and 2k (inclusive) is equal to the number of primes between k and reverse(k) (inclusive).at n=28A074814
• List the positions of all digits '1' in the sequence. This is the lexicographically earliest increasing sequence with this property.at n=42A098645
• Number of binary strings of length n with equal numbers of 010 and 101 substrings.at n=16A164146
• Least natural number n in increasing order such that the sum of decimal digits is equal to A001223(n).at n=35A179462
• Number of partitions of n for which 2*(number of distinct parts) <= (number of parts).at n=39A237363
• Number of length n+3 0..6 arrays with no pair in any consecutive four terms totaling exactly 6.at n=2A246477
• T(n,k)=Number of length n+3 0..k arrays with no pair in any consecutive four terms totalling exactly k.at n=30A246479
• Number of length 3+3 0..n arrays with no pair in any consecutive four terms totalling exactly n.at n=5A246482
• Number of length 3+1 0..2*n arrays with the sum of the absolute values of adjacent differences equal to 3*n.at n=16A249983
• Numbers k such that antisigma(k) contains k as a substring.at n=10A255968
• a(n) = 9*n^2 + 21*n - 6 (n>=1).at n=45A304374
• Number of parts in all partitions of n with largest multiplicity three.at n=32A320373