22232

Appears in sequences

• Expansion of tanh(log(1+x)/cos(x)).at n=8A009786
• Every suffix prime and no 0 digits in base 5 (written in base 5).at n=13A024780
• Numbers k whose decimal representation, read as a base-18 value and divided by k, yields an integer.at n=29A032567
• Numbers using only digits 2 and 3.at n=32A032810
• Numbers having four 2's in base 10.at n=17A043500
• Number of ways to cover (without overlapping) a ring lattice (necklace) of n sites with molecules that are 7 sites wide.at n=43A058366
• Put the natural numbers together without spaces and read them five at a time advancing one space each time.at n=33A193493
• Number of n X 3 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically.at n=7A207747
• T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically.at n=52A207752
• T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 0 1 and 1 0 1 vertically.at n=47A209650
• List of primitive words over the alphabet {2,3}.at n=23A213971
• Numbers m such that if x = sigma(m)-phi(m)-tau(m)-m then m = sigma(x)-phi(x)-tau(x)-x.at n=3A238230
• The 300-degree spoke (or ray) of a hexagonal spiral of Ulam.at n=43A244804
• Number T(n,k) of tilings of a 5 X n rectangle with pentominoes of any shape and exactly k pentominoes of shape X; triangle T(n,k), n>=0, read by rows.at n=21A247711
• Numbers consisting only of digits 2 and 3, ordered according to the value obtained when the digits are interspersed with (right-associative) ^ operators.at n=42A248907
• Expansion of e.g.f. BesselI(1,2*log(1 - x))/((1 - x)*log(1 - x)).at n=7A317169
• Numbers m such that 3^(2m+1) - 3^m + 1 is prime.at n=12A344263
• Number of edges formed in a square by straight line segments when connecting the four corner vertices to the points dividing the sides into n equal parts.at n=25A355948
• Array read by downward antidiagonals: T(k,n) is the least number that has k prime factors (counted with multiplicity) and is the concatenation of n primes, or -1 if there is no such number.at n=40A374376
• a(n) is the first number that is the concatenation of n primes and also the product of n primes (counted with multiplicity).at n=4A374665