20201

Properties

Appears in sequences

• Primes in ternary.at n=41A001363
• Numbers that are the sum of 11 positive 8th powers.at n=35A003389
• Numbers that are the sum of 8 positive 9th powers.at n=10A003397
• Primes that remain prime through 3 iterations of function f(x) = 5x + 4.at n=28A023284
• n written in fractional base 4/2.at n=41A024630
• Primes of the form j^2 + (j+1)^2.at n=35A027862
• Primes p such that p+1 is palindromic.at n=28A028981
• Multiplicity of highest weight (or singular) vectors associated with character chi_58 of Monster module.at n=38A034446
• Number of partitions of n with equal nonzero number of parts congruent to each of 0 and 1 (mod 4).at n=52A035546
• Primes having only {0, 1, 2} as digits.at n=17A036953
• In the list of divisors of n (in base 3), each digit 0-2 appears equally often.at n=9A045811
• Least prime in A031936 (lesser of 18-twins) whose distance to the next 18-twin is 2*n.at n=25A052358
• Balanced primes separated from the next lower and next higher prime neighbors by 18.at n=0A053073
• First occurrence of distances of equidistant lonely primes. Each equidistant prime is at the same distance (or has the same gap) from the preceding prime and the next prime.at n=3A054342
• Duplicate of A054342.at n=3A058869
• Luhn primes: primes p such that p + (p reversed) is also a prime.at n=33A061783
• Primes whose sum of digits is 5.at n=23A062341
• Primes with arithmetic mean of digits = 1 (sum of digits = number of digits).at n=13A069710
• Łukasiewicz word for each rooted plane tree (interpretation e in Stanley's exercise 19) encoded by A014486 (or A063171), with the last leaf implicit, i.e., these words are given without the last trailing zero, except for the null tree which is encoded as 0.at n=32A071153
• Totally balanced decimal numbers: if we assign the weight w(d) = d-1 to each digit d (i.e., w(0) = -1, w(1) = 0, ..., w(9) = 8) and then read the digits of the term from left to right, the partial sum of the weights is never negative and the total weighted sum is zero.at n=38A071154