20846

Appears in sequences

• List of codewords in binary lexicode with Hamming distance 6 written as decimal numbers.at n=35A075934
• a(0) = a(1) = 1. a(n) = Sum_{p|n} a(n-p), where the sum is over all distinct primes p that divide n.at n=60A134192
• Relative of Hofstadter Q-sequence: a(n) = max(0, n+20830) for n <= 0; a(n) = a(n-a(n-1)) + a(n-a(n-2)) + a(n-a(n-3)) for n > 0.at n=20A283887
• Numbers k such that k!6 + 9 is prime, where k!6 is the sextuple factorial number (A085158 ).at n=32A288154
• A digitized pure tuning tone, sampled at standard settings for consumer audio: a(n) = floor(sin(2*Pi*(440/44100)*n)*32767).at n=11A320277