81119

Properties

Appears in sequences

• McKay-Thompson series of class 22a for Monster.at n=32A058569
• a(1)=1, a(n) is the smallest integer > a(n-1) such that the sum of elements of the simple continued fraction for S(n)=1/a(1)+1/a(2)+...+1/a(n) equals n^3.at n=14A071971
• Primes which are 1 + strobogrammatic numbers A000787(n): the same upside down.at n=9A105268
• Primes such that the outer 2 digits are n and n+1 and all inner digits are 1, where 0 < n < 9.at n=2A108818
• Number T(n,k) of tilings of an n X k rectangle using integer-sided square tiles reduced for symmetry, where the orbits under the symmetry group of the rectangle, D2, have 4 elements; triangle T(n,k), k >= 1, 0 <= n < k, read by columns.at n=34A224867
• Primes p such that A272207(p) = p.at n=33A276030
• Primes having only {1, 8, 9} as digits.at n=37A385783
• Prime numbersat n=7941