23682

Appears in sequences

• Coefficients of Bell's formula for making change.at n=4A002576
• Numbers k such that k^2 and k^3 have the same set of digits.at n=30A029797
• Numbers which are the sum of their proper divisors containing the digit 4.at n=34A059463
• Number of subsets of {1, ..., n} that are double-free but not sum-free.at n=18A088810
• An Alexander sequence for the knot 7_6.at n=8A099449
• Structured octagonal anti-diamond numbers (vertex structure 7).at n=17A100187
• Number of partitions of n containing m(5) as a part, where m denotes multiplicity.at n=44A240490
• Triangle read by rows: coefficients in Bell's formula for number of ways of making change when coins have denominations which are powers of 2.at n=23A262554
• Start with a Koch snowflake tile, and repeatedly append along the tiles of the previous step tiles scaled by a factor of sqrt(1/3) and rotated by 90 degrees that do not overlap with any prior tile and of which one third of the perimeter matches one sixth of the perimeter of adjacent prior tiles; a(n) gives the number of tiles appended at n-th step.at n=13A330844