184602

Appears in sequences

• Number of upward triangles in a Star of David matchstick arrangement of size n.at n=33A045950
• a(n) is the smallest number m such that for the n-digit number s=10^(n-1)+ m, 10*s+1, 10*s+3, 10*s+7 and 10*s+9 are primes.at n=29A097639