193873

Properties

Appears in sequences

• Primes p such that the partition number of the p-th prime is also a prime.at n=7A144466
• Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 7 ones in any 4 X 4 X 4 subtriangle.at n=13A153955
• Smallest m such that the period of the continued fraction of sqrt(m) is A215485(n); records of A013646.at n=40A215508
• Prime numbersat n=17489