27174

Appears in sequences

• Coordination sequence for A_6 lattice.at n=5A008387
• Decimal part of n-th root of a(n) starts with digit 2.at n=54A034079
• a(n) is the number of subsequences {s(k)} of {1,2,3,...n} such that s(k+1)-s(k) is 1 or 3.at n=22A050228
• Square array T(n,k) (n >= 1, k >= 0) read by antidiagonals: coordination sequence for root lattice A_n.at n=60A103881
• Consider the Levenshtein distance between k considered as a decimal string and k considered as a binary string. Then a(n) is the number of nonnegative integers having a Levenshtein distance of n.at n=14A115780
• Number of integer sequences of length n+1 with sum zero and sum of absolute values 10.at n=5A157054
• Number of arrays of 5 integers in -n..n with sum zero and the sum of every adjacent pair being odd.at n=13A202077
• G.f.: exp( Sum_{n>=1} A005064(n)*x^n/n ), where A005064(n) = sum of cubes of primes dividing n.at n=14A220427
• Number of Sidon subsets of {1,...,n} of size 4.at n=31A241688