19048

Appears in sequences

• a(n+6) = -a(n+5) + a(n+4) + 3a(n+3) + a(n+2) - a(n+1) - a(n). a(n) = sign(n) if abs(n)<=3.at n=35A001945
• Powers of sqrt(6) rounded up.at n=11A017924
• Powers of fourth root of 6 rounded up.at n=22A018062
• Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 69.at n=29A031567
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 69.at n=1A031747
• Smallest d such that real quadratic field with discriminant d has class number n.at n=21A081364
• Number of different, not necessarily connected, unlabeled trivalent diagrams of size n.at n=18A121352
• Number of length n+6 0..1 arrays with at most one downstep in every n consecutive neighbor pairs.at n=39A255997
• Number of solutions to +-1 +- 3 +- 6 +- 10 +- ... +- n*(n + 1)/2 = n.at n=24A351002
• Number of edges in a Farey fan of order n.at n=45A360043
• Consecutive states of the linear congruential pseudo-random number generator (10924*s+11830) mod (2^15+1) when started at s=1.at n=21A384150