18868
domain: N
Appears in sequences
- Numbers k such that 145*2^k+1 is prime.at n=19A032422
- Column 2 of triangle A055907.at n=30A055908
- Numbers whose squares have 2R-1 digits, such that the number represented by leftmost R digits and number represented by rightmost R digits divide each other evenly.at n=17A216233
- Number of (n+5)X6 0..1 matrices with each 6X6 subblock idempotent.at n=3A224570
- Number of (n+5)X9 0..1 matrices with each 6X6 subblock idempotent.at n=0A224573
- T(n,k)=Number of (n+5)X(k+5) 0..1 matrices with each 6X6 subblock idempotent.at n=6A224577
- T(n,k)=Number of (n+5)X(k+5) 0..1 matrices with each 6X6 subblock idempotent.at n=9A224577
- Number of (n+1) X (7+1) 0..3 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant-stress 1 X 1 tilings).at n=10A235288
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 161", based on the 5-celled von Neumann neighborhood.at n=31A270452
- Least nonnegative integer which requires n letters to spell in Turkish excluding spaces and hyphens.at n=27A305100