214830

Appears in sequences

• Values of m such that N = (am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,69.at n=19A065702
• Numbers taking exactly 21 steps to reach 15 in A086793.at n=12A119397
• Numbers k such that Euler phi(Dedekind psi(k)) > k.at n=15A196200
• a(n) = n * A002445(n).at n=15A228838
• Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0, 2 or 3 neighboring 1's.at n=4A296581
• Number of n X 5 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0, 2 or 3 neighboring 1's.at n=4A296585
• T(n,k)=Number of nXk 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0, 2 or 3 neighboring 1s.at n=40A296588
• Numbers k such that k + 1, 2k + 1, 3k + 1, 4k + 1, and 6k + 1 are all prime.at n=8A333721
• a(n) is the first number with a total of exactly n 3's in the decimal digits of its divisors.at n=43A387464