30010

Appears in sequences

• Number of bicentered hydrocarbons with n atoms.at n=18A000200
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 38.at n=2A031626
• Numbers divisible by the sum of factorials of their digits [A061602(n)] and also terminate in the sum of factorials of their digits.at n=19A071064
• Full Łukasiewicz word for each rooted plane tree (interpretation e in Stanley's exercise 19) encoded by A014486 (or A063171).at n=10A079436
• Number of compositions of n where the smallest part is greater than the number of parts.at n=52A098132
• Numbers k such that k and k^2 use only the digits 0, 1, 3, 6 and 9.at n=55A136850
• Number of parts of the n-th subshell of the head of the last section of the set of partitions of any even integer >= 2n.at n=21A182992
• [s(k)-s(j)]/10, where the pairs (k,j) are given by A205877 and A205878, and s(k) denotes the (k+1)-st Fibonacci number.at n=33A205880
• Consider a number k with m decimal digits, the prefix p of length m-1 and the suffix s of length m-1. The sequence lists the numbers k such that sigma(k) = sigma(p)*sigma(s) where sigma(x) is the sum of the divisors of x.at n=26A244313
• Poincaré series for hyperbolic reflection group with Coxeter diagram shown in Comments.at n=16A265053
• Decimal representation of the middle column of the "Rule 61" elementary cellular automaton starting with a single ON (black) cell.at n=14A266791
• a(n) is the greatest integer k such that k/Fibonacci(n) < 2/5.at n=25A293639
• a(n) is the least integer k such that k/Fibonacci(n) > 2/5.at n=25A293640
• a(n) is the integer k that minimizes |k/Fibonacci(n) - 2/5|.at n=25A293641
• Irregular triangle read by rows: row n lists all of the distinct derivable strings in the MIU formal system that are n characters long.at n=11A369173