30404

Appears in sequences

• Number of quartic bicolored graphs on n unlabeled nodes admitting an automorphism exchanging the colors.at n=10A000843
• Numbers k such that k^2 + 3*k + 1 is a palindrome.at n=24A028348
• Multiples of 11 with digit sum 11, with no zero digits in odd places.at n=28A083512
• 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, -1, 0), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.at n=8A150273
• a(n) = 1331*n - 209.at n=22A157444
• Numbers n such that prime(n) + reversal(prime(n)) is a square.at n=26A227371
• Number of length n+5 0..3 arrays with no disjoint triples in any consecutive six terms having the same sum.at n=3A247990
• T(n,k)=Number of length n+5 0..k arrays with no disjoint triples in any consecutive six terms having the same sum.at n=18A247995
• Number of length 4+5 0..n arrays with no disjoint triples in any consecutive six terms having the same sum.at n=2A247999
• Numbers with digit sum 11 that are multiples of 11.at n=39A283742
• Triangle read by rows: T(n,k) is the number of non-isomorphic n X n symmetric binary matrices with k ones in every row and column up to permutation of rows and columns.at n=70A333159
• Triangle read by rows: T(n,k) is the number of non-isomorphic n X n symmetric binary matrices with k ones in every row and column up to permutation of rows and columns.at n=73A333159
• Irregular triangle T(n,k), n >= 0, 0 <= k <= 2*n+1, read by rows, where T(n,k) = [x^k] (1-x)^(n+1) * Sum_{k=0..n} (2*k+1)^n * x^k.at n=28A382289