22145

Appears in sequences

• a(n) = a(n-1) + a(n-2) + a(n-3).at n=16A007486
• Numbers having four 3's in base 9.at n=16A043468
• Numbers whose base-3 representation has exactly 10 runs.at n=1A043590
• Numbers n such that number of runs in the base 3 representation of n is congruent to 1 mod 9.at n=19A043807
• Numbers n such that number of runs in the base 3 representation of n is congruent to 0 mod 10.at n=1A043815
• Number of partitions of n with even crank.at n=41A124227
• Triangle T(n,k) by rows: T(n, k) = (n-k+1)*T(n-1, k-1) + k*T(n-1, k) + T(n-2, k-1) with T(n, 1) = T(n, n) = 1.at n=31A144438
• Triangle T(n,k) by rows: T(n, k) = (n-k+1)*T(n-1, k-1) + k*T(n-1, k) + T(n-2, k-1) with T(n, 1) = T(n, n) = 1.at n=32A144438
• Triangle T(n,k), 0<=k<=n, read by rows, given by (0, 1, 1, 3, 3, 6, 6, 10, 10, 15, ...) DELTA (1, 0, 2, 0, 3, 0, 4, 0, 5, ...) where DELTA is the operator defined in A084938.at n=52A211183
• Numbers for which the root mean square of nontrivial divisors is an integer and which are not a square of prime numbers.at n=35A247137
• Numbers of the form prime(w)*prime(x)*prime(y) with w >= x >= y such that 2w = 3x + 4y.at n=31A358102