29305
domain: N
Appears in sequences
- Indices of primes in sequence defined by A(0) = 47, A(n) = 10*A(n-1) - 13 for n > 0.at n=20A101727
- Semiprimes in A056106.at n=34A113524
- Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 101-111-100 pattern in any orientation.at n=13A146194
- Centered 44-gonal numbers.at n=36A195318
- Numbers k such that 3*5^(2*k) - 3*5^k + 1 is prime.at n=14A227447
- Numbers whose septenary, octal and nonary representations are prime when read in decimal.at n=25A281252
- Number of excursions of length n with Motzkin-steps avoiding the consecutive steps UU, UD, HH and DU.at n=30A329689
- Number of nonisomorphic open quipus with n nodes.at n=20A363251