20577

Appears in sequences

• Numbers k such that k divides s(k), where s(1)=1, s(j)= s(j-1) + j*7^(j-1).at n=29A014948
• Numbers k such that k | 8^k + 1.at n=21A015955
• a(n) = a(n-3) + a(n-4), with a(0)=1, a(1)=a(2)=0, a(3)=1.at n=56A017817
• Expansion of Product_{k>=1} (1 + 3*x^k).at n=26A032308
• Base 9 digits are, in order, the first n terms of the periodic sequence with initial period 3,1,2,0.at n=4A037784
• Number of 3 X 3 integer matrices with elements in the range [ -n,n ] which represent a rotation of order 2.at n=11A053171
• Numbers n such that n | 7^n + 6^n + 5^n.at n=22A057234
• Numbers n such that n | 12^n + 11^n + 10^n + 9^n + 8^n + 7^n.at n=35A057257
• Numbers n such that n | 6^n + 5^n + 1.at n=20A057299
• Number of compositions of n such that two adjacent parts are not equal modulo 2.at n=26A062200
• Number of positions that are exactly n moves from the starting position in the Dino Cube puzzle, mirror positions counted once.at n=10A079767
• A089450 indexed by A000040.at n=15A089525
• Numbers n such that n divides 2^n^2 + 1.at n=22A093546
• Numbers k that divide 2^(k^3) + 1.at n=23A093665
• Quadrisection of a generalized Padovan sequence.at n=14A099099
• Composite numbers whose exponents in their canonical factorization lie in the geometric progression 1, 3, 9, ...at n=17A102838
• Expansion of 1/((1+x)^3-x^4).at n=16A107068
• Number of permutations of [n] avoiding the pattern 1-23-4.at n=8A113227
• a(n) = 3*n^3.at n=19A117642
• Numbers k for which 8*k+1, 8*k+5, 8*k+7 and 8*k+11 are primes.at n=30A123983