218987

Properties

Appears in sequences

• Numbers k such that k+x+y is a square and k+u+v is a triangular number, where x and y are the two squares nearest to k, while u and v are the two triangular numbers nearest to k.at n=2A239203
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 654", based on the 5-celled von Neumann neighborhood.at n=17A283588
• Lowest prime p in a ladder of 5 consecutive primes p, p+2, p+6, p+14, p+30.at n=13A372248
• Prime numbersat n=19525