18258

Appears in sequences

• Number of 4-connected 4-regular polyhedra with n nodes.at n=14A007023
• Self-convolution of row n of array T given by A026022.at n=9A027294
• "AFK" (ordered, size, unlabeled) transform of 2,2,2,2,...at n=18A032005
• Numbers k such that k*prime(k)-2 is a perfect square.at n=5A106042
• Numbers whose square starts with 4 identical digits.at n=18A132391
• Triangle of coefficients of the Pollaczek polynomials with a=1, b=1 multiplied by n! to make then integers.at n=19A136454
• a(n) = 961*n - 1.at n=18A158412
• Number of permutations of 1..n containing the relative rank sequence { 235164 } at any spacing.at n=3A159146
• Number of permutations of 1..n containing the relative rank sequence { 241635 } at any spacing.at n=3A159152
• Number of permutations of 1..n containing the relative rank sequence { 246135 } at any spacing.at n=3A159157
• Number of permutations of 1..n containing the relative rank sequence { 251634 } at any spacing.at n=3A159162
• Number of (n+1)X7 0..3 arrays with every 2X2 subblock having nonzero determinant and commuting with every horizontal or vertical neighbor.at n=6A206341
• Number of (n+1)X8 0..3 arrays with every 2X2 subblock having nonzero determinant and commuting with every horizontal or vertical neighbor.at n=5A206342
• Main diagonal starting k=2 of array A(k,n) = numbers n such that n^k - prime(n) is a prime.at n=42A213477
• Records in A096335 (values).at n=32A221181
• Iterations at which Langton's Ant living on triangular tiling reaches the distance of n from the origin for the first time.at n=37A275303
• Numbers whose square starts with exactly 4 identical digits.at n=17A346940
• a(n) is the smallest number which can be represented as the sum of n distinct centered n-gonal numbers in exactly n ways, or -1 if no such number exists.at n=14A352975