18376

Appears in sequences

• Fibonacci sequence beginning 1, 18.at n=16A022108
• Numbers k in which the digits of k^2 appear.at n=29A029774
• 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 67.at n=39A031565
• Number of partitions satisfying (cn(0,5) <= cn(2,5) = cn(3,5) and cn(0,5) <= cn(1,5) and cn(0,5) <= cn(4,5)).at n=51A036807
• Numbers k such that k^2 contains only digits {3,6,7}.at n=4A053946
• Number of positive integers <= 2^n of form 7 x^2 + 9 y^2.at n=18A054188
• a(n) = n*F(n-1) + F(n), where F = A000045.at n=17A094588
• Number of n-bit base-2 deletable primes.at n=20A096235
• Iccanobirt numbers (11 of 15): a(n) = R(a(n-1) + R(a(n-2)) + R(a(n-3))), where R is the digit reversal function A004086.at n=20A102121
• Numbers k such that k and k^2 use only the digits 1, 3, 6, 7 and 8.at n=9A137038
• Number of reduced words of length n in the Weyl group A_47.at n=3A161692
• Number of (n+2)X4 binary arrays with each 3X3 subblock having a positive determinant.at n=3A186056
• Number of (n+2)X6 binary arrays with each 3X3 subblock having a positive determinant.at n=1A186058
• T(n,k)=Number of (n+2)X(k+2) binary arrays with each 3X3 subblock having a positive determinant.at n=11A186063
• T(n,k)=Number of (n+2)X(k+2) binary arrays with each 3X3 subblock having a positive determinant.at n=13A186063
• Number of (n+1) X (1+1) 0..2 arrays with no element equal to a strict majority of its horizontal and vertical neighbors, with upper left element zero.at n=4A231138
• Number of (n+1)X(5+1) 0..2 arrays with no element equal to a strict majority of its horizontal and vertical neighbors, with upper left element zero.at n=0A231142
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no element equal to a strict majority of its horizontal and vertical neighbors, with upper left element zero.at n=10A231144
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no element equal to a strict majority of its horizontal and vertical neighbors, with upper left element zero.at n=14A231144
• Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change -1,1 1,0 1,-1 or 0,-1.at n=8A264331