25134

Appears in sequences

• Coefficients of modular function denoted G_6(tau) by Atkin.at n=21A005764
• Numbers k such that phi(k) + 2 | sigma(k + 2).at n=23A015781
• Positive numbers k such that k and 2*k are anagrams in base 6 (written in base 6).at n=33A023064
• Numbers n such that n^2 is a sum of 2 and also of 4 consecutive primes.at n=24A252066
• G.f.: Product_{k>=1} (1 + 3*x^(k^2)) / (1-x^k).at n=26A280225
• Decimal representation of permutations of lengths 1, 2, 3, ...at n=26A306428
• Total number of 0's in all (binary) max-heaps on n elements from the set {0,1}.at n=19A309051
• Derangements of {1,2,...,n} (n >= 2) in lexicographic order.at n=20A320588
• Number of ways of having a total of n coins in your two pockets (each of them either a penny, a nickel, a dime, or a quarter), so that the amounts in the pockets are identical.at n=29A323825
• G.f. satisfies A(x) = 1 + x*A(x)^2*(1 + x^3*A(x)^2).at n=10A365268
• The number of ways to place one pawn and n+1 nonattacking queens on an n X n chessboard, unchanged by 180-degree rotation.at n=18A368061