19509

Appears in sequences

• Expansion of 1/(1-x^5-x^6-x^7-x^8-x^9-x^10-x^11-x^12-x^13).at n=44A017844
• Number of 6-ary search trees on n keys.at n=15A019500
• a(n) = A027113(n, n+2).at n=13A027114
• Trisection of A007294.at n=39A073470
• A122890 + A000012 - I, I = Identity matrix.at n=42A135723
• Number of (n+1) X 2 0..2 arrays with no 2 X 2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases in its adjacent leftward or upward neighbors.at n=4A206270
• Number of (n+1) X 6 0..2 arrays with no 2 X 2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases in its adjacent leftward or upward neighbors.at n=0A206274
• T(n,k) = number of (n+1) X (k+1) 0..2 arrays with no 2 X 2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases in its adjacent leftward or upward neighbors.at n=10A206277
• T(n,k) = number of (n+1) X (k+1) 0..2 arrays with no 2 X 2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases in its adjacent leftward or upward neighbors.at n=14A206277
• Number of partitions of 2n having twice as many odd parts as even.at n=25A239258
• Number of partitions of n into two sorts of parts having exactly 6 parts of the second sort.at n=9A258476