67344

Appears in sequences

• Numbers k such that 273*2^k + 1 is prime.at n=45A053353
• Triangle read by rows: T(n,k) = T(n-1,k-1) +T(n-1,k) +n*(n-1)*T(n-2,k-1) for n>4 and 1<=k<=n.at n=47A153592
• Number of ternary words of length n in which all digits 0..2 occur in every 6 consecutive digits.at n=11A249019
• (1+e)-sigma amicable numbers.at n=21A274116
• G.f.: x^2 * f''(x), where f(x) = Product_{k>=1} (1 + x^k).at n=24A278407
• Lesser of recursive amicable numbers pair: numbers m < k such that m = s(k) and k = s(m), where s(k) = A333926(k) - k is the sum of proper recursive divisors of k.at n=11A333929
• Expansion of ( Sum_{k>=0} k^2 * q^(k^2) )^4.at n=55A347803