40446

Appears in sequences

• Larger of unitary amicable pair.at n=3A002953
• a(n) = round(n*phi^18), where phi is the golden ratio, A001622.at n=7A004953
• a(n) = ceiling(n*phi^18), where phi is the golden ratio, A001622.at n=7A004973
• Aliquot sequence starting at 138.at n=20A008888
• Aliquot sequence starting at 150.at n=19A008889
• Aliquot sequence starting at 168.at n=17A008890
• Unitary amicable numbers.at n=7A063991
• Aliquot sequence starting at 570.at n=15A074907
• Least k, 1 <= k <= 2^n, such that the continued fraction for 2^n/k contains the maximum number of elements.at n=15A089636
• Numbers that can be written using its own digits in order and by using addition and factorial operators.at n=19A195670
• The number of P-positions in the game of Nim with up to five piles, allowing for piles of zero, such that the total number of objects in all piles doesn't exceed 2n.at n=19A238147
• Number of partitions p of n such that round(mean(p)) is not a part of p; here, round(x) means floor(x + 1/2).at n=45A241734
• a(n) = A273059(4n+1).at n=35A275917
• Hosoya triangle of Morgan Voyce type, read by rows.at n=46A284131
• List of pairs of unitary amicable numbers (m, n) with record low values of m/n.at n=5A292020
• Least number k such that A304036(k) = n.at n=28A304039
• Expansion of Sum_{k>=0} x^(k^2) / Product_{j=1..k} (1 - j*x^j).at n=30A318770
• Fully multiplicative with a(prime(k)) = Lucas(2*(k+1)) for k-th prime p, where Lucas(n) = A000032(n).at n=37A324900
• Numbers that are members of unitary sigma aliquot cycles (union of unitary perfect, unitary amicable and unitary sociable numbers).at n=44A327157
• Irregular triangle of cycles of purely periodic unitary sigma aliquot sequences with their smallest member as starting number, read by rows.at n=46A336216