428040

Appears in sequences

• Number of conics which pass through 3 points and are bitangent to a general curve of order n.at n=30A060783
• 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=30A065702
• a(n) = 3*a(n-1) + 3*a(n-3) + a(n-4).at n=11A089931
• Analog of Fermat quotients: a(n) = (round((phi_3)^p)-3)/p, where phi_3 = (3+sqrt(13))/2 and p = prime(n).at n=5A213328
• Decimal representation of the middle column of the "Rule 126" elementary cellular automaton starting with a single ON (black) cell.at n=18A267367