21935

Appears in sequences

• Numbers whose base-5 representation contains exactly three 0's and three 2's.at n=22A045187
• Numbers 41*k such that 41*k+2 and 41*k-6 are both prime.at n=6A153822
• Half the number of (n+1) X (n+1) binary arrays with no 2 X 2 subblock having exactly 2 ones.at n=3A183773
• Half the number of (n+1) X 5 binary arrays with no 2 X 2 subblock having exactly 2 ones.at n=4A183777
• T(n,k) = half the number of (n+1) X (k+1) binary arrays with no 2 X 2 subblock having exactly 2 ones.at n=24A183782
• Expansion of 1/(1-x-x^2-x^3-x^4+x^5+x^6+x^7-x^9).at n=17A258000
• Number of colored integer partitions of n such that five colors are used and parts differ by size or by color.at n=11A327383
• a(n) = Sum_{d|n} (-1)^(n/d-1) * binomial(d+3,4).at n=25A366814
• Number of integer compositions of n whose leaders of strictly increasing runs are themselves strictly increasing.at n=32A374688