18441

Appears in sequences

• Engel expansion for i^i = exp(-Pi/2).at n=7A083283
• Sum of terms in 'rows' of A178746.at n=7A178747
• a(n) = (A216363(n) - 1)/118.at n=39A216380
• Numbers x such that the sum of all their cyclic permutations is equal to that of all cyclic permutations of sigma(x) and all cyclic permutations of Euler totient function phi(x).at n=14A247317
• Number of length n+3 0..2 arrays with some disjoint pairs in every consecutive four terms having the same sum.at n=19A247527
• Numbers n not divisible by 2 such that n^2 written in base 4 has no digit > 1.at n=9A257284
• Number of n X 3 binary arrays with rows and columns lexicographically nondecreasing and row and column sums nondecreasing.at n=14A266357
• The icosagen sequence : a(n) = A018227(n)-5, for n >= 2.at n=44A271997
• a(n) = 36*2^n + 9.at n=9A305154