123306

Appears in sequences

• a(n) = floor( n*(n-1)*(n-2)*(n-3)/29 ).at n=45A011939
• Numbers n such that 30*n+{1,7,11,13,17,23,29} are all prime.at n=3A100422
• Number of (n+1)X(3+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111.at n=3A259422
• Number of (n+1)X(4+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111.at n=2A259423
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111.at n=17A259427
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111.at n=18A259427
• a(n) = Sum_{k=1..n} |Stirling1(n,k)| * Catalan(k-1).at n=7A355292
• Numbers k such that there are exactly 7 primes between 30*k and 30*k+30.at n=21A385124