18781
domain: N
Appears in sequences
- Sums of 5 distinct powers of 5.at n=11A038477
- Palindromes arising in A053779.at n=3A053780
- Number of positive integers <= 2^n of form x^2 + 14 y^2.at n=17A054228
- Palindromes with successive increasing difference: a(k)-a(k-1) > a(k+1)- a(k).at n=39A071250
- a(n) = A051707(A025487).at n=29A108460
- a(1) = 1, then the rearrangement of odd palindromes such that every concatenation is a prime for n > 1.at n=32A113578
- Palindromic primes in base 9 (written in base 9).at n=28A117703
- Least positive integer m > 1 such that 1 - m^k + m^(2k) - m^(3k) + m^(4k) is prime, where k = A003592(n).at n=42A181980
- Number of rucksack partitions of n: every consecutive constant subsequence has a different sum.at n=47A353864
- Number of integer partitions of n whose rounded-down mean is 2.at n=44A363745
- a(n) = Sum_{k=0..n} (-1)^k * binomial(n+k,n-k) * Fibonacci(k+1).at n=15A390851