27472

Appears in sequences

• Palindromic in bases 9 and 10.at n=18A029965
• Even palindromes in which parity of digits alternates.at n=42A030149
• Base-9 palindromes that start with 4.at n=35A043031
• Palindromic and divisible by 8.at n=40A045643
• Palindromes with exactly 6 prime factors (counted with multiplicity).at n=12A046332
• Triangle read by rows: T(n,k) is the number of permutations of [n] with k alternating runs (n>=2, k>=1).at n=38A059427
• Number of permutations of [n] with 3 sequences.at n=7A060157
• Table with g.f. [1-x*n-sqrt(x^2*n^2-2*n*x+1+4*x^2-4*x)]/(2*x).at n=52A128888
• Biquadrateful (i.e., not biquadrate-free) palindromes.at n=18A133514
• Number of 6X6 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n.at n=39A156389
• Expansion of (1-2x-sqrt(1-8x+8x^2))/(2x).at n=7A166229
• Numbers that are 5-digit palindromes in at least two bases.at n=33A180454
• Numbers which are representable as a sum of seventeen but no fewer consecutive nonnegative integers.at n=38A270302
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 253", based on the 5-celled von Neumann neighborhood.at n=33A271052
• a(n) = A000041(n)*A000070(n-1), n >= 1.at n=12A340492
• Möbius transform of A341528, n * sigma(A003961(n)).at n=47A347124
• G.f. A(x) satisfies: -x^3 = Sum_{n=-oo..oo} (-1)^n * x^(n*(n+1)/2) * A(x)^(n*(n-1)/2).at n=13A354648
• Number of quasi series-parallel matroids on [n].at n=7A359986
• Array read by antidiagonals: T(n,m) is the number of total dominating sets in the n X m rook graph K_n X K_m.at n=39A384116
• Array read by antidiagonals: T(n,m) is the number of total dominating sets in the n X m rook graph K_n X K_m.at n=41A384116