151121
domain: N
Properties
Primality
- Prime
- yes
Appears in sequences
- Erroneous version of A134996.at n=15A038136
- Primes p such that 1p1, 3p3, 7p7 and 9p9 are all primes.at n=25A059694
- The n-th highly composite number equals the a(n)-th composite number, for n >= 3.at n=30A074329
- Vertically symmetrical dates DDMMYY ("condensed European notation") considered as numbers, in increasing order.at n=3A107276
- Primes with digital product = 10.at n=9A107696
- Dihedral calculator primes: p, p upside down, p in a mirror, p upside-down-and-in-a-mirror are all primes.at n=16A134996
- a(n) is the index of the smallest n-gonal pyramidal number with binary weight n.at n=39A359092
- Prime numbersat n=13942