131327

Appears in sequences

• Number of reversible string structures with n beads using exactly two different colors.at n=18A056326
• Number of primitive (aperiodic) reversible string structures with n beads using a maximum of two different colors.at n=18A056331
• Number of primitive (aperiodic) reversible string structures with n beads using exactly two different colors.at n=18A056336
• Numbers having in binary representation a leading 1 followed by n zeros and n-1 ones.at n=8A092431
• Expansion of (1-3*x+3*x^2)/(1-5*x+10*x^2-10*x^3+4*x^4).at n=17A098179
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 1), (1, 1, -1), (1, 1, 0)}.at n=11A148722
• a(n) = 6*a(n-1) - 8*a(n-2)-3 for n > 1; a(0) = 35, a(1) = 135.at n=6A171473
• Number of bicolored cyclic patterns n X n.at n=17A187767
• Composite numbers n such that b^(n+1) == 1 (mod n) for every b coprime to n.at n=24A208728
• Maximal term of TRIP-Stern sequence of level n corresponding to permutation triple (e,13,132).at n=33A271487
• a(n) = 2^(n+1) + n^2 - 1.at n=16A290707